My PC has gotten slow and jerky, and I keep getting "a script has stopped running" errors. Any solutions?

I'm using Vista and Firefox with Mcafee security.

Anonymous2011-11-12T10:52:41Z

Favorite Answer

Well...Try this first. Run full scans with these two programs, and email me if this doesn't do it.

http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html?tag=rb_content;main
Say no to free trial on install.

http://download.cnet.com/SuperAntiSpyware-Free-Edition/3000-8022_4-10523889.html?tag=dropDownForm;productListing

Anonymous2011-11-12T10:55:11Z

You may have a virus. You will need to reinstall the OS, get all your goodies off first or you will lose them. If you take your machine to a shop, tell them to save your goodies, and I will bet new York to a brick you have a useless free AV