Every time you work something on your computer, it write some info on local disk. Fragmented files are spread all around the hard disk and that slows down computer. So, you need to defragment every few weeks.
How to defragment?
Go to Start - Programs - Accessories - System tools - Disk defragmenter. On defragmenter, just click (and select) disk drive and click on Defragment. After you finish with one disk drive, do the same with another.
Imagine this. You are working in MSWord, close it, that work some in Dreamveawer and Photoshop, close both and than you turn on Winamp to listen some music and start surfing the Internet. All named programs have some DLL files loaded in your RAM until you turn of the computer. And working on computer will be slower and slower. To change that, and to make that DLL files unload after closing particular software, do next:
HKEY_LOCAL_MACHINE/Software/Microsoft/ Windows/CurrentVersion/Explorer
Make new STRING Value, name it AlwaysUnloadDll and give value 1 to it.
Than just restart your Windows.
