I'm using Avira for years now. They have a free version on the Internet. I must say its detection rate is high and notifies you right away the moment it detects something suspicious. I recommend Avira for an anti-virus. You can also use Malwarebytes.
I'd suggest if you have Comcast to download the free Norton they offer. If you don't have it I'd suggest AVG free edition
you can try microsoft security essentials, they have it on there site. its never let me down. and its free which is the best part.
As my computer also attack by virus last day, I try to scan it using avira but there is virus found then I use Malwarebytes' Anti-Malware, treated my PC against invisible malware virus
I would use a proper untivirus software that you pay for but you know it'll do the job and keep you protected in the long run. Symantec or Mcaffee are the most popular, I think they cost around $40 per year with free upgrades, antimalware and so on. Put yourself and your computer on the safe side.
I use semantic end point protection for win xp and now i am using Norton Anti virus 11 for my windows 7 Ultimate OS ...
Hi you should use a anti virus but wait you are already attacked by virus.you should re install your os because virus can be any ware on your hard drive so if you are going to install a anti virus on virus attacked pc the virus can take action in your installation other wise anti virus not work so good with ought theis current update.you can use a good quality antivirus. dont use free anti virus or trail they dont work perfectly.
you can use any anti virus.. if your computer was broken.. so u must format it.. please use 1 or more anti virus..
Your best bet is to download a free AVG anti-virus. If you can't download it cause your PC is infected, then you must download the virus on a USB stick and then transfer the virus from your USB stick to your infected computer and then run it from the USB stick. You might have to install the FREE AVG sample on safemode, if possible. If this doesn't work, just restore your computer to a previous point in time where your computer did not have the virus. This always works. Make sure to save any work that may be important. Hope this helps!
I'm using a full version of AVG. Anything related to Windows is bad anti-virus protection. Also, McAfee definitely sucks! Don't get McAfee or your computer will be infected again.