VIPRE Antivirus is an antivirus and antispyware program for Windows 2000/XP/Vista/7.  It rates within the top 25 of antivirus software programs on CNET and has seen over 160,000 downloads from that source alone.  VIRPE is free to try for 30 days and costs $29.95 for further use.

VIPRE antivirus installs in just a couple of minutes and can be run immediately without restarting your PC.  [...]