Couple days ago I inserted a USB drive into my desktop, and right away my symantec auto protect notified me about the an infected file - io.pif - coming from the removable drive. I quarantined it, disconnect myself from the network and performed a full scan right away, the result came back with 0 infected files.
I deleted the copy in the quarantine and performed 2 more full scans (one in safe mode and one in normal), both sessions reported 0 infected files, so does it indicated the system is "clean" now. What other potential infections can I be running into.
I studied the file online and it's polymorphic, so it can be appearing under different names ... Checking task manager didn't reveal anything suspicious.