So here I am on campus doing some work in the computer lab, when the computer's anti-virus program notifies me that it has deleted a trojan called "autorun.inf" on my USB drive. I did some research and I found out that autorun.inf is utilized by the CDTray Trojan, which causes the CD-Rom tray to open and close periodically on an infected computer. A few weeks ago, my home desktop was doing that, so I did an anti-virus and spyware/malware scan which revealed nothing. Despite nothing being revealed, the activity of the cd-rom tray opening and closing by itself stopped. Now, I don't know if anti-virus programs can remove viruses during scans without notifying the user, maybe that's what happened. My worry is that the CdTray trojan is still on my home desktop, though it's now dormant. How can I make sure the the CDTray trojan is no longer on my computer?

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.