Safe Guides to Remove Win32/Gamarue.gen!A

HELP! Please help me with this nasty Behavior:Win32/Gamarue.gen!A malware on my new computer. I just upgraded system days ago. i had not downloaded any new tool yet besides Microsoft malicious software removal tool. Lately, I got massage warning about this virus. I used my removal tool to delete it but it was not detected in scan result. I tried cleaning suspicious files. But as long as computer restarted, this virus infected system again.