Just curious because i sometimes hear "my computer would be much fatser without all the music and videos and movies and pictures...." and so on, is that true or not?To a certain degree.  The main thing to worry about is available hard disk space as opposed to hard drive space.  Also, the more you have loaded, the more things run in MEMORY and use available memory.  Adding more RAM to a slow computer or simply uninstalling unused software can help too.  There's always the ol MSCINFIG too. having lots of stuff on the hard drive will slow things down if you do not defragment it regularly, and also if it is nearly full speed will suffer.

If you have moved files such as large movies or music files around, your drive is most likely fragmented. Windows stores bits and pieces of one FILE scattered out on the hard drive and when you request that file, it needs to go through the hard drive and find each piece. When you defragment your drive, it will take all the pieces of the file on the hard drive and line them up with each other. This will speed up your computer a lot because then all the pieces of the file are located right next to each other on the drive.Yeah, KEEP in mind what MULLINS said too, adding more RAM will do wonders (depending on how much you already have) also defragging your hard drive does speed it up a bit too.

I guess I didn't add anything new to this thread but that's my 2 cents worth...  1. scandisk
2. defrag puter  when it needs it*
3 install and run Ccleaner
4.  whenever you get  "past"  50%   "used space" on your hard drive,  the speed is greatly reduced.*
Allright thanx guys! now i know what to say to PEOPLE that ask me that question, and what to do if my hard drive gets filled with stuff.
-Filip