As the topic says, I'm trying to reformat my computer. I've never done this before either... I guess I'll try to explain. It all happened when I was trying to get audio to work on sites like Youtube. Somebody told me to install CCleaner, which I did. I ran the program and thought everything was fine. I finished doing what I was doing and shut the computer down for the night. Next day I started it up & my desktop image was replaced with something telling me to download antivirus 2008 or something like that. Then I started to browse the net and everything i searched in google got redirected. Soon after a timer popped up and when it got to zero it shut my computer down. That's when I backed-up all of my files and found my Windows XP CD. I put it in my CD-Rom drive and it read it. Then I restarted the computer and it didn't prompt me to push a certain button to boot the CD. So that's basically where I am. I know how to do the reformatting, I just can't get my Windows XP CD to boot. Can anybody help me out? Edit- I forgot to mention that now when I boot up my computer it gives me this error message, "lphcl4m0evf7.exe - corrupt file. The file or directory C:\DOCUME~1\LOCALS~1\TEMP.tt2a.tmp is corrupt & unreadable. Please run the Chkdsk utility." And soon thereafter my computer will freeze.