Here are some simple tips.
Defragment your hard drive often - The Disk Defragmenter can be launched if you open My Computer, right click on your C: drive, select Properties, then go to the Tools tab. Select your hard drive and click Defragment. It might take a while to do, but you can use your PC when it is running.. it will just run slow until the defragment completes.
Download Adaware 6.0 - http://www.lavasoft.de/software/adaware/ has Adaware, which will scan your computer for programs running in the background that monitor your internet surfing. These kinds of programs can slow down your PC.
I can go into more detail about how to turn off unnecessary Services or remove programs from your startup configuration (namely some useless Dell-provided apps), but you should try the first two things listed above first.
It came fom this: http://forums.us.dell.com/supportforums/help_faq
Then post back with some info and someone probably can get you going.
now i can wright in the body part ok my computer is running ok but it slow when i am downloading any thing verry slow and all so i would like to know how to watch movies on here in fuul screen with out it being all fuzzy and cutting out thank u all for tryinh to help me out oh yea and the 6.0 thing is a great thing to have thank's alot people becouse i don't know much about a computer i have a dell dem 4100 i think i just got it not to long ago windows me if u need to know more about it please tell me where i can go to find it thank's agen munk
If you are not a starter with computer stuffs and even your computer is not too new then you maybe facing this problem of Slow computer speed. So here is the article for this so you can solve this issue
Best c++ ide