I suggest you start with the basic but effective scanners like Malwarebytes, and the provide us with a HiJackthis Log
This previous discussion explains some details about running Malwarebytes and Hijackthis. http://www.syschat.com/internet-expl...usly-6834.html
If you have an existing antivirus software, update it. Install Malwarebytes and update it as well. Install HiJackthis (we will use this for later)
boot into safe mode, do a full scan with your antivirus software. feel free to do a second scan with malwarebytes. after the two scans in safe mode, boot into normal windows mode, and then take a hijackthis log, and post it back here.
running the the antivirus and malwarebytes scan in safe mode is usually good enough to rid of existing virus. the hijackthis log will be a manual check that we;ll do to review the startup programs and settings on your computer