As extracted from the above url.
Problems with
Virtual Memory
It may sometimes happen that the system give out of memory
messages on trying to load a program, or give a message about
Virtual memory space being low. Possible causes of this are:
The setting for Maximum Size of the page file is too low, or there
is not enough disk space free to expand it to that size.
The page file has become corrupt, possibly at a bad shutdown. In
the Virtual Memory settings, set to No page file, then exit
System Properties, shut down the machine, and reboot. Delete
PAGEFILE.SYS (on each drive, if more than just C
,
set the page file up again and reboot to bring it into use.
The page file has been put on a different drive without leaving a
minimal amount on C:.
There is trouble with third party software. In particular, if the
message happens at shutdown, suspect a problem with Symantecs
Norton Live update, for which there is a fix posted here. It is
also reported that spurious messages can arise if NAV 2004 is
installed. If the problem happens at boot and the machine has an
Intel chipset, the message may be caused by an early version
(before version 2.1) of Intels Application Accelerator.
Uninstall this and then get an up-to-date version from Intels
site.
Another problem involving Norton Antivirus was recently discovered
by MS-MVP Ron Martell. However, it only applies to computers where
the pagefile has been manually resized to larger than the default
setting of 1.5 times RAM a practice we discourage. On such
machines, NAV 2004 and Norton Antivirus Corporate 9.0 can cause
your computer to revert to the default settings on the next reboot,
rather than retain your manually configured settings. (Though this
is probably an improvement on memory management, it can be
maddening if you dont know why it is happening.) Symantec has
published separate repair instructions for computers with NAV 2004
and NAV Corporate 9.0 installed. [Added by JAE 2/21/06.]
Possibly there is trouble with the drivers for IDE hard disks; in
Device Manager, remove the IDE ATA/ATAPI controllers (main
controller) and reboot for Plug and Play to start over.
With an NTFS file system, the permissions for the page files
drives root directory must give Full Control to SYSTEM. If not,
there is likely to be a message at boot that the system is unable
to create a page file.
