Attached Link: http://www.microsoft.com/technet/sysinternals/FileAndDisk/PageDefrag.mspx

Have you changed anything on your PC (I assume it *is* a PC)? Check out the memory updater if you've added RAM. The other thing that seems critical is the health of your virtual memory page swap file. I eventually put mine on a separate partition to everything else; how you do this will depend on your version of Windows. I do hope it isn't '95. ;P Whether or not you move your page file, I'd recommend Sysinternal's pagedefrag. Normal defragmentation doesn't touch the page file, or several other essential bits of disk space. Pagedefrag will keep your PC healthy.