For 64bit users, check your virtual memory settings and make sure the size is managed by windows, or raise the maximum to a higher size if you wan to leave static sizes. I let windows manage it myself since w7 does a good job keeping the drives from fragmenting.
For 32 bit users, there is a workaround but it may have adverse effects so b careful to leave the original line and add the line as indicated in this steps..
Windows support a switch option in BOOT.INI called the /3GB switch, which adjusts the way memory is allocated between the user and the operating system. By default, the split is fifty-fifty -- up to two gigabytes for the user and two for the operating system. The /3GB switch option sets those limits at three gigs maximum for the user and one gig for the operating system.
As the name implies, /3GB was originally meant to be used in systems that have 3 GB or more of RAM -- something that is no longer quite as rare as it used to be! However, even if you don't have 3 GB or more of memory, you can still use the /3GB switch successfully if you are running memory-hungry desktop applications. Photoshop, for instance, is infamous for staking out as much RAM as it can. With /3GB enabled, there's that much more memory that the application can use.
To add the /3GB switch as a separate boot option:
2-Click the Edit button under System Startup to edit the BOOT.INI file.
3-Find the current boot entry, which typically looks like this:
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect
4-Copy the line on step 3, from your own BOOT.INI not from this post, and paste it at the end of the BOOT.INI file as a second entry, and change the description and add the /3GB flag, something like this:
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional 3GB Switch" /fastdetect /3GB
This lets you choose between a conventional boot entry and the /3GB boot entry. If something goes wrong when you use /3GB, you can always boot back into the original configuration.
5-Save and close BOOT.INI.
6-Click OK to close the Startup and Recovery panel.
7-Click Settings again, and in the "Default operating systems:" dropdown, choose the newly created boot entry with the /3GB switch.
8-Click OK to close everything. Reboot into the new profile.
Hope this helps someone

Ergo
Edited by Fantastic Ergo, 20 February 2014 - 08:21 PM.