I have a few things to add to this, if Pascal doesn't mind.
Pascal wrote:... Ok, why did you send him to download junk...
The system information panel could be confusing to some, and it's only available under Windows XP (OS information was never given). Therfore, I assumed it easier for him to simply download an informative, non- installing, lightweight program.
but certain ones you should recognize like Yahoo Chat or Google Chat or other odd programs... If you select them and click end Proccess(in the lower right hand corner) it will free up that memory.
It's generally safe to kill everything under your user name (e.g. compaq_owner) in the Task Manager, except for "explorer.exe" which you should only end if you know exactly what your doing.
However, it would be advisable to
properly shutdown all programs that you have error-free access to and only use Task Manager (the built-in utility of which you are speaking of) to close down frozen programs and ones that run in the background.
The free solution to this is to defrag your hard drive... this will take many many hours but when it's done it can save you alot of time because your files will open faster (but it won't be that "like new" feeling you had when you first got the computer... it's impossible because there are too many files)... to defrag go to,
Start>Programs>Accessories>System Tools>Disk Defragmentor
By clicking analyze your computer will make a report and tell you whether or not you need to defragment... If you need to defragment just click on the Defragmenter button.
It should be noted, however, that if your HD is especially full (generally around 77% so) the defrag will not function properly.