How can I be sure I completely got rid of this virus?

I suggest updating and running these programs every week or so to make sure that your computer is virus and anti-spyware free.

These are a few FREE programs (which I personally use), which work great together to check whether your computer is infected, if anything is found they will remove the problem files. Make sure to disable your own Anti-virus before installing a new one because it may cause a conflict.

Download the following:

Spybot: Search & Destroy - Application to scan for spyware, adware, hijackers and other malicious software. Make sure to download all of the newest updates before scanning.

http://www.safer-networking.org/en/mirrors/index.h...

Windows Defender - Windows Defender is a free program that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software. Make sure to download all of the newest updates before scanning.

http://www.microsoft.com/athome/security/spyware/s...

A Free online Scan you can perform is at Trend Micro’s website. They have an online scanner that works through your internet browser to detect viruses and malware on your computer. http://housecall.trendmicro.com/

AVG Anti-Virus and Anti-Malware Free Edition -http://free.grisoft.com/doc/5390/lng/us/

Make sure to disable your own Anti-virus before installing a new one because it may cause a conflict. Make sure to download all of the newest updates before scanning.

To prevent future problems download SpywareBlaster and PC Tools Firewall Plus. Update them both and make sure to enable all protection.

http://www.javacoolsoftware.com/spywareblaster.htm...

http://www.pctools.com/firewall/

Use both of these tomake sure everything is gone. They are both free and safe to use.

SUPERAntiSpyware is the most thorough scanner on the market. Our Multi-Dimensional Scanning and Process Interrogation Technology will detect spyware that other products miss! SUPERAntiSpyware will remove ALL the Spyware, NOT just the easy ones.Easily remove over 100,000 pests such as SmitFraud, Vundo, WinFixer, SpyAxe, SpyFalcon, WinAntiVirus, AntiVermins and thousands more!

http://superantispyware.com/

CCleaner is a freeware system optimization and privacy tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware

http://ccleaner.com/

* You will probably recieve several answer to you question. Whoever helped you the most,please come back and give that person Best Answer.

SmitfraudFix SHOULD have got it all. It usually does.

What you had was a classic Smitfraud infection which is caused when the Trojan Zlob gets downloaded to your computer and then Zlob "phones home" to download the phony alerts.

But as a final step, you could scan for trojans and remove (free online scan, no download) with Ewido.(Now called AVG Anti-spyware. Not the same as AVG Anti-virus)

http://www.ewido.net/en/

This makes sure that the original Trojan Zlob, which caused all your misery in the first place, is totally removed. If Zlob remains, it can "phone home" again and re-infect your computer.

This happened to me a couple weeks ago. Run a virus scan on you computer, if there's a virus it should detect it. Also, if you computer is running fine then chances are that it's ok.

what you had was a hijacker not a virus

adaware

www.lavasoft.com

spybot s&d

www.safernetworking.org

are 2 of the top picks for removing any spyware or hijackers

get them updated, reboot and do a full scan

well if your computer seems to be fine then it is most likely gone

good luck