I recommend you UnHackMe - Ultimate Malware Killer for fast malware removal:
Free Download Fully Functional 30-day Trial. No credit card is required.
Reviews. EULA. Privacy Policy. Uninstall.
We check some samples of nsvb.exe and detected the file nsvb.exe as threat.
You need remove the nsvb.exe from your computer right now.
Removal tool: http://www.unhackme.com