The first thing you would think of installing an antivirus software, but as you know there are hundreds of antivirus programs out there - paid and free, and it gets hard to decide which one is the best. And also an anti virus program alone can’t defend against all threats. So it is recommended using DrWeb CureIt to scan your PC. This application doesn’t need installation, so you can use it even if you have already installed 'other' security program.
Dr.Web CureIt is an easy to use free utility, which help users to clean their infected computer. This program incorporates an anti-virus and anti-spyware scanning engine, based on DrWebs’s popular Anti-virus scanner.
CureIt is able to detect and remove many malicious codes such as rootkits, adware, different types of malware, Trojans, etc and very quickly.
However it is not recommend as a permanent tool to cure your computer because it does not include the Dr.Web Automatic Updating utility. To scan your computer with the most up-to-date virus databases next time you should download new Dr.Web CureIt! package.Dr.Web CureIt supports Windows 98/ 2000/XP/2003/Vista