my computer has a virus what shall i do?

[Gentlemenalarm616]

I recommend using avast home edition for good free protection.

Avast Home Edition guards your PC and the network with multiple shields that scan executables and files. You can select parameters for scanning, and even choose wildcards to exclude specific file types. You can adjust the sensitivity level for the program's detectors when it comes to scanning downloaded files, instant messages, e-mails, and a host of P2Ps. Its efficient interface opens up window after window to tweak its settings to your liking, for novice to advanced level protection.


For spyware protection i recommend using superantispyware free edition.

uperAntiSpyware, a next generation product, with its Multi-Dimensional Scanning and Process Interrogation Technology will detect spyware and remove over 1,000,000 pests such as Vundo, ZLob, SmitFraud, WinFixer, VirusRay, and VirusHeat. Repair broken Internet connections, desktops, registry editing, and task manager. The program provides complete and custom scanning of hard drives, removable drives, memory, registry, individual folders include trusting items and excluding folders for complete customization of scanning. Detect and remove spyware, adware, malware, Trojans, dialers, worms, keyloggers, and hijackers. Prevent potentially harmful software from installing or re-installing. First Chance Prevention examines over 50 critical points of your system each time your system starts up and shuts down to eliminate threats before they have a chance to infect and infiltrate your system. Our Direct Disk Access (DDA) technology sees rootkits others miss.

For malware removal you should use malwarebytes.

Malwarebytes' Anti-Malware is a high performance anti-malware application that thoroughly removes even the most advanced malware and spyware. With one of the fastest, most effective quick scans and malware removal capabilities on the market, this program is the perfect addition to your PC's defenses. The full version of the product includes a number of key features, including the ability to schedule updates and scans and most importantly, a real-time malware protection module that blocks malicious processes before they even start.

To protect against keyloggers I HIGHLY recommend using keyscrambler.

KeyScrambler Personal is a free plug-in for your Web browser that protects everything you type from keyloggers. It defeats keyloggers by encrypting your keystrokes at the keyboard driver level, deep within the operating system. When the encrypted keystrokes reach your browser, KeyScrambler then decrypts them so you see exactly the keys you've typed. Keyloggers can only record the encrypted keys, which are completely indecipherable. Unlike anti-virus and anti-spyware programs that depend on recognition to remove keyloggers that they know about, KeyScrambler will protect you from both known and unknown keyloggers. What's more, KeyScrambler provides protection without getting in your way. You don't have anything to learn about the program and you don't have to do anything differently, but with KeyScrambler your important personal information will be a whole lot safer.

Use a good firewall.

PC Tools Firewall Plus Free Edition 4

PC Tools Firewall Plus Free Edition is a powerful personal free firewall for Microsoft Windows that protects your computer from hackers and intruders. Firewalls control the network traffic in and out of your PC by monitoring applications that connect to the network. Firewall Plus can stop Trojans, backdoors, and keyloggers from damaging your computer and stealing your private information. PC Tools Firewall Plus is advanced technology designed specially for people, not experts. Powerful prevention against attacks and known exploits is activated by default and advanced users can also easily create their own packet filtering rules to customize the network defenses. The program is recommended for use alongside of AntiSpyware and Antivirus software like AVG or Spyware Doctor to protect PC against Spyware, hackers, worms, and viruses.

These are all free.

Stay safe on the internet and remember never download anything recommended by a popup.

Links:

Malwarebytes
http://download.cnet.com/Malwarebytes-An...

Superantispyware
http://download.cnet.com/SuperAntiSpywar...

Avast home edition
http://download.cnet.com/Avast-Home-Edit...

Firewall

http://download.cnet.com/PC-Tools-Firewa...