My antivirus is webroot spy sweeper
Webroot offers several products, and if you just have "Spy Sweeper", it's not an antivirus program. It's antispyware program.
Webroot offers also "Webroot AntiVirus with AntiSpyware & Firewall", and then you do have antivirus program, and a firewall (available also separately).
Which one do you have, or rephrasing, do you have a real antivirus protection?