1 “Limited Virtual Memory Error” in Windows XP SP2

1 “Limited Virtual Memory Error” in Windows XP SP2
1 “Limited Virtual Memory Error” in Windows XP SP2
Customer name: United India Insurance Co ltd, Salem
H/w Details: IBM E-Series Server PIII, 512MB DDR,18GB RAID Volume.
S/w Details: Windows XP Profession SP2
Problem: Error coming while booting telling "Limited Virtual Memory".
Error message:
"Limited Virtual Memory
Your system has no paging file, or the paging file is too small.
To fix this problem, go to System in Control Panel, click the Advanced tab, and under
Performance, click Settings. On the Advanced tab, click Change. Click 'Custom size,'
and then type an initial or maximum paging file size".
--------This solution is with reference of MS Knowledge Base No: 315270
As per the KB, the cause of this error is because Administrators account dont have
correct NTFS permission to create Paging file in NTFS Volume.
1. Boot your machine into safe mode.
2. Start->Programs->My Computer->Right Click->Properties
->Advanced->Under Performance->Settings->Advanced
in Virtual Memory->Change
In this windows, we will be able to see the Volumes which are set with Paging files.
If the Administrators do not have correct permission, even after setting the page file,
after next reboot we will be prompted with the above said error. For this we need to set
the permission.
3. Go into My Computer and select the corresponding drive(Ex C:)and get the properties
of this drive through "File->Properties or Right-Click->Properties.
4. On Security tab, Click Add and \\computername\system.
5. and Add -> \\computername\Administrators.
6. Complete this task and give OK.
7. Now set your virtual memory settings of your choice and make sure that it is set on
next reboot.
Reference: Microsoft KB:315270
Applicable to:
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional
Microsoft Windows XP Professional x64 Edition
Solution By : J Bala ERC
Value Addition
-----------------What is Virtual Memory?
Virtual Memory as its name implies, it is a imaginary memory area supported by OS (Eg:
Windows, Linux.) in conjunction with Hardware. It creates application program the
impression that it has contiguous working memory space to work on. Also virtual
memory can be defined as "Alternate Set of Memory Addresses" which will be used by
application programs to store their instructions and data.
While the program is actually executed, the virtual addresses are converted into
real memory addresses.
Why virtual memory required?
Virtual memory is not only for extending physical memory space by using hard disk
space. It serves main functionality to provide free space to application program by
copying the physical memory contents of programs which are inactive.
For example, We have 128MB of RAM Size. if you load the operating system, an e-mail
program, a Web browser and word processor into RAM simultaneously, 128 megabytes
is not enough to hold it all. If there were no such thing as virtual memory, then once you
filled up the available RAM your computer would have to say, "Sorry, you can not load
any more applications. Please close another application to load a new one." With virtual
memory, what the computer can do is look at RAM for areas that have not been used
recently and copy them onto the hard disk. This frees up space in RAM to load the new
Because this copying happens automatically, you don't even know it is happening, and it
makes your computer feel like is has unlimited RAM space even though it only has 128
megabytes installed. Because hard disk space is so much cheaper than RAM chips, it
also has a nice economic benefit.
Value Addition by : J Bala
2. Squid Proxy Configuration in RHEL AS 4.0
--------------------------------------------------------------Customer Name:SCAD College of Engineering, Cheranmahadevi
Hardware Details:2700SO Server
Software Details:RHEL AS 4.0
Problem :Squid proxy configuration
For proxy configuration we need to edit the default proxy configuration file
We need to put the following entry under tag :http_access
http_access allow all
After that save the file
Type the following command at the hash prompt
#service squid start
Then squid service will start
Then enable the port 3128 in firewall configuration if any firewall is enabled
This can be done by typing "setup" command at the hash prompt
Type the following for enable 3128 port
and give ok
In client machine we have to put the proxy server IP as the proxy IP (right click internet
explorer -->properties -->connection --->lan settings --->proxy server addrss
and 3128 as default port
Now we can connect to the internet in the client which is having the same network IP
Procedure for allowing or denying only particular IP; blocking unwanted websites and URLS
We need to create following files in /etc/squid directory
ip.allow - in this file mention the ip's of the clients from which browsing to be allowed
domain.deny - mention the websites we want to block
url.deny - mention the url's which we want to block
Again we need to edit the squid.conf file
#vi /etc/squid/squid.conf
search for the tag:acl
under that we have to add the following lines
acl unsafe_domain dstdom_regex -i "/etc/squid/domain.deny"
acl unsafe_url urlpath_regex -i "/etc/squid/url.deny"
acl allowed_ip src "etc/squid/ip.allow"
Then search for the following line in the file just below the above added lines
Under that add the following lines
http_access deny unsafe_domain
http_access deny unsafe_url
http_access allow allowed_ip
save and exit from the file
restart the service
# service squid restart
Solution by : Praful K G
3. Windows could not start because the following file is missing or corrupt:
--------------------------------------------------------------------------------------------------------------------Customer Name
: Rajasthan Spinning and Weaving Mills Ltd, Banswara, Rajasthan
Hardware Details
: HCL Infinity Global Line 2700 BD2 with RAID, Windows server
2003 Standard
Edition (SP2 Upgraded )
: Lotus Domino Server 6.xx, SAV 11.xx
Software Details
Problem Description : The server was misbehaving while communicating through
network like permission issue, loosing connection intermitted. As
per the observation of the customer, the problem was started after
the installation of SAV 11.xx. So customer tried to remove the
antivirus software. As it was not removing using “ADD REMOVE
Programs” they have removed all registry entries containing the
word “Symantec” using REGEDIT. After this exercise they
restarted the server. OS stopped with error
Windows could not start because the following file is missing or corrupt:
This error says the registry is corrupt. So we tried for any
available backup of %systemroot%system32\config \. Back up
was not available. Customer was having the exported backup of
registry in *.reg format in E:\.
1. The basic solution for system file missing is to copy the “system” file from
%systemroot%\restore\ to %systemroot%system32\config \. This will give you a
registry which is created at the time of installation.
The idea was to load this and import the *.reg.
2. Run the CHECKDISK option and rebooted but same error.
3. Booted from the OS cd and given the RAID driver, using R option we got the
command prompt. Renamed the original %systemroot%system32\config
\system to system.old and copied the %systemroot%\repair\system to
%systemroot%system32\config \system
4. Rebooted the system. It started but it gave BSOD and restarted. So idea failed.
The cause of BSOD may be the hardware changes happened after the fresh
installation or The OS deference as it was updated with lot of patches and
service pack 2 after the installation.
5. So copied back the original “system” file.
6. Booted from the CD and used repair option by selecting R. This worked
and system booted properly.
7. Here under referred the procedure to recover the same error for Windows XP.
Some of the exercises will be applied to 2003 servers also
Solution By : U Sooraj
How to recover from a corrupted registry that prevents Windows XP from starting
This article describes how to recover a Windows XP system that does not start because
of corruption in the registry. This procedure does not guarantee full recovery of the
system to a previous state; however, you should be able to recover data when you use
this procedure.
Warning Do not use the procedure that is described in this article if your computer has
an OEM-installed operating system. The system hive on OEM installations creates
passwords and user accounts that did not exist previously. If you use the procedure that
is described in this article, you may not be able to log back into the recovery console to
restore the original registry hives.
You can repair a corrupted registry in Windows XP. Corrupted registry files can cause a
variety of different error messages. See the Microsoft Knowledge Base for articles about
error messages that are related to registry issues.
This article assumes that typical recovery methods have failed and access to the system
is not available except by using Recovery Console. If an Automatic System Recovery
(ASR) backup exists, it is the preferred method for recovery. Microsoft recommends that
you use the ASR backup before you try the procedure described in this article.
Note Make sure to replace all five of the registry hives. If you only replace a single hive
or two, this can cause potential issues because software and hardware may have
settings in multiple locations in the registry.
When you try to start or restart your Windows XP-based computer, you may receive one
of the following error messages:
Windows XP could not start because the following file is missing or corrupt:
Windows XP could not start because the following file is missing or corrupt:
Stop: c0000218 {Registry File Failure} the registry cannot load the hive (file):
\SystemRoot\System32\Config\SOFTWARE or its log or alternate
System error: Lsass.exe
When trying to update a password the return status indicates that the value
provided as the current password is not correct.
Manual steps to recover a corrupted registry that prevents Windows XP from
The procedure that this article describes uses Recovery Console and System Restore.
This article also lists all the required steps in specific order to make sure that the process
is fully completed. When you finish this procedure, the system returns to a state very
close to the state before the problem occurred. If you have ever run NTBackup and
completed a system state backup, you do not have to follow the procedures in parts two
and three. You can go to part four.
Part one
In part one, you start the Recovery Console, create a temporary folder, back up the
existing registry files to a new location, delete the registry files at their existing location,
and then copy the registry files from the repair folder to the System32\Config folder.
When you have finished this procedure, a registry is created that you can use to start
Windows XP. This registry was created and saved during the initial setup of Windows
XP. Therefore any changes and settings that occurred after the Setup program was
finished are lost.
To complete part one, follow these steps:
1. Insert the Windows XP startup disk into the floppy disk drive, or insert the Windows
XP CD-ROM into the CD-ROM drive, and then restart the computer.
Click to select any options that are required to start the computer from the CDROM drive if you are prompted to do so.
2. When the "Welcome to Setup" screen appears, press R to start the Recovery
3. If you have a dual-boot or multiple-boot computer, select the installation that you
want to access from the Recovery Console.
4. When you are prompted to do so, type the Administrator password. If the
administrator password is blank, just press ENTER.
5. At the Recovery Console command prompt, type the following lines, pressing
ENTER after you type each line:
md tmp
copy c:\windows\system32\config\system c:\windows\tmp\system.bak
copy c:\windows\system32\config\software c:\windows\tmp\software.bak
copy c:\windows\system32\config\sam c:\windows\tmp\sam.bak
copy c:\windows\system32\config\security c:\windows\tmp\security.bak
copy c:\windows\system32\config\default c:\windows\tmp\default.bak
delete c:\windows\system32\config\system
delete c:\windows\system32\config\software
delete c:\windows\system32\config\sam
delete c:\windows\system32\config\security
delete c:\windows\system32\config\default
copy c:\windows\repair\system c:\windows\system32\config\system
copy c:\windows\repair\software c:\windows\system32\config\software
copy c:\windows\repair\sam c:\windows\system32\config\sam
copy c:\windows\repair\security c:\windows\system32\config\security
copy c:\windows\repair\default c:\windows\system32\config\default
6. Type exit to quit Recovery Console. Your computer will restart.
Note This procedure assumes that Windows XP is installed to the C:\Windows folder.
Make sure to change C:\Windows to the appropriate windows_folder if it is a different
If you have access to another computer, to save time, you can copy the text in step five,
and then create a text file called "Regcopy1.txt" (for example). To use this file, run the
following command when you start in Recovery Console:
batch regcopy1.txt
With the batch command in Recovery Console, you can process all the commands in a
text file sequentially. When you use the batch command, you do not have to manually
type as many commands.
Part two
To complete the procedure described in this section, you must be logged on as an
administrator, or an administrative user (a user who has an account in the Administrators
group). If you are using Windows XP Home Edition, you can log on as an administrative
user. If you log on as an administrator, you must first start Windows XP Home Edition in
Safe mode. To start the Windows XP Home Edition computer in Safe mode, follow these
Note Print these instructions before you continue. You cannot view these instructions
after you restart the computer in Safe Mode. If you use the NTFS file system, also print
the instructions from Knowledge Base article KB309531. Step 7 contains a reference to
the article.
1. Click Start, click Shut Down (or click Turn Off Computer), click Restart, and then
click OK (or click Restart).
2. Press the F8 key.
On a computer that is configured to start to multiple operating systems, you can
press F8 when you see the Startup menu.
3. Use the arrow keys to select the appropriate Safe mode option, and then press
4. If you have a dual-boot or multiple-boot system, use the arrow keys to select the
installation that you want to access, and then press ENTER.
In part two, you copy the registry files from their backed up location by using System
Restore. This folder is not available in Recovery Console and is generally not visible
during typical usage. Before you start this procedure, you must change several settings
to make the folder visible:
Start Windows Explorer.
On the Tools menu, click Folder options.
Click the View tab.
Under Hidden files and folders, click to select Show hidden files and folders,
and then click to clear the Hide protected operating system files
(Recommended) check box.
Click Yes when the dialog box that confirms that you want to display these files
Double-click the drive where you installed Windows XP to display a list of the
folders. If is important to click the correct drive.
Open the System Volume Information folder. This folder is unavailable and
appears dimmed because it is set as a super-hidden folder.
Note This folder contains one or more _restore {GUID} folders such as
Note You may receive the following error message:
C:\System Volume Information is not accessible. Access is denied.
If you receive this message, see the following Microsoft Knowledge Base article
to gain access to this folder and continue with the procedure:
309531 How to gain access to the System Volume Information folder
Open a folder that was not created at the current time. You may have to click
Details on the View menu to see when these folders were created. There may be
one or more folders starting with "RPx under this folder. These are restore points.
Open one of these folders to locate a Snapshot subfolder. The following path is
an example of a folder path to the Snapshot folder:
C:\System Volume Information\_restore{D86480E3-73EF-47BC-A0EBA81BE6EE3ED8}\RP1\Snapshot
10. From the Snapshot folder, copy the following files to the C:\Windows\Tmp folder:
11. Rename the files in the C:\Windows\Tmp folder as follows:
These files are the backed up registry files from System Restore. Because you used the
registry file that the Setup program created, this registry does not know that these
restore points exist and are available. A new folder is created with a new GUID under
System Volume Information and a restore point is created that includes a copy of the
registry files that were copied during part one. Therefore, it is important not to use the
most current folder, especially if the time stamp on the folder is the same as the current
The current system configuration is not aware of the previous restore points. You must
have a previous copy of the registry from a previous restore point to make the previous
restore points available again.
The registry files that were copied to the Tmp folder in the C:\Windows folder are moved
to make sure that the files are available under Recovery Console. You must use these
files to replace the registry files currently in the C:\Windows\System32\Config folder. By
default, Recovery Console has limited folder access and cannot copy files from the
System Volume folder.
Note The procedure described in this section assumes that you are running your
computer with the FAT32 file system. For more information about how to access the
System Volume Information Folder with the NTFS file system, click the following article
number to view the article in the Microsoft Knowledge Base:
309531 How to gain access to the System Volume Information folder
Part Three
In part three, you delete the existing registry files, and then copy the System Restore
Registry files to the C:\Windows\System32\Config folder:
1. Start Recovery Console.
2. At the command prompt, type the following lines, pressing ENTER after you type
each line:
del c:\windows\system32\config\sam
del c:\windows\system32\config\security
del c:\windows\system32\config\software
del c:\windows\system32\config\default
del c:\windows\system32\config\system
copy c:\windows\tmp\software c:\windows\system32\config\software
copy c:\windows\tmp\system c:\windows\system32\config\system
copy c:\windows\tmp\sam c:\windows\system32\config\sam
copy c:\windows\tmp\security c:\windows\system32\config\security
copy c:\windows\tmp\default c:\windows\system32\config\default
Note Some of these command lines may be wrapped for readability.
3. Type exit to quit Recovery Console. Your computer restarts.
Note This procedure assumes that Windows XP is installed to the C:\Windows folder.
Make sure to change C:\Windows to the appropriate windows_folder if it is a different
If you have access to another computer, to save time, you can copy the text in step two,
and then create a text file called "Regcopy2.txt" (for example). To use this file, run the
following command when you start in Recovery Console:
batch regcopy2.txt
Part Four
1. Click Start, and then click All Programs.
2. Click Accessories, and then click System Tools.
3. Click System Restore, and then click Restore to a previous RestorePoint
Value Addition by : U Sooraj
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