I am really trying to clean this computer up. What are some things I can do? I just want to know ...anything...that will help this thing.

I know about Disk Cleanup and I do that. I'm running ScanDisk right now and thats alright...

I TRIED to do Disk Defragmenter but it sais that my C Drive is locked by a utility...HELP!

I downloaded a free version of Ad-Aware. My mom uses it upstairs on her computer and it works awesome for her. However, it won't work on mine...it scans....finds the bad folders/files...but it won't quarantine/delete them.

Does anyone know where I can get a free trial/version of Norton Anti-Virus or another good virus scanner?

I really need help, this computer drives me INSANE