is your problem a warning low virtual memory,are you running xp if so you need to access advanced settings on system and double the size of the vm ie if your memory is 256 set to 512 this will fix that problem.
If you have x\p and have plenty of space on your hard drive then you could have 1gig min and 1gig max for 256meg of physical ram. If you have more physical ram installed then you can increase this.
I have 256sdram in my x\p machine and have my virtual memory set at 1.25 gig min and max.
If you keep the min and max the same, this stops the hard drive shrinking and expanding when you need the hard drive for additional memory. This in turn will cut down on the fragmentation of files as they are written to the hard drive.