Virus overload

My sister in laws computer is absolutely infested with viruses. She bought it used, but she paid a good price for it. When she bought it, it was already infected with viruses. I'm trying to fix it for her, but I'm beyond knowing what to do at this point....

The homepage goes to something about internet security and it tells me what I need to download, but I'm not crazy about downloading any kind of antispyware that I dont know about. A man I work with suggested that I download avast. Does anyone else have any suggestions on what to do?

I've always taken mine to geek squad at best buy.

I would just repartition the hard drive and install a clean OS. ...problem solved with very little effort.

all you have to do is restart the computer and keep pressing F8 and a screen should come up then restore to an earlier point in time then go back as far as you can or maybe it will say full factory restore.

you mite have to reinstall window if the viruses mestup the systum files. thats if you got a recovery disc or a recovery on your hard drive. you can look in start menu my computer see if there's a recovery there. I cude tele you more if I new what brand your pc is windows you are running. and you shud have automatic updates turned on. here is a good anti-virus it's called (pc-security-shield) and here's a free anti-spyware from microsoft it's called (windows defender).

you mite have to reinstall window if the viruses mestup the systum files. thats if you got a recovery disc or a recovery on your hard drive. you can look in start menu my computer see if there's a recovery there. I cude tele you more if I new what brand your pc is windows you are running. and you shud have automatic updates turned on. here is a good anti-virus it's called (pc-security-shield) and here's a free anti-spyware from microsoft it's called (windows defender).

Agree with earlier advice.

Wipe the hard drive clean and reinstall Windows.

Get hold of a windows 98 boot floppy.Boot from it.Format every drive.And reinstall the os.

If you want a good free virus scanner and blocker get AVG. It's fast, free and easy, plus you get up-dates from it too, all free

...geez I sounded like a salesman..

AVG is good, but I thought they quit givibng away the home version? Avast is onother free one (for home use) that comes not only with virus protection, but an entire suite of protective services. It's background scanner seems smarter than AVG which caused my PC to become useless whenever it was running.