I actually got called out to a client this afternoon specifically to deal with this issue. It actually is more difficult than you think to recognize.
From what I saw on his PC it actually wasn't picking up any of the files. It was registry keys. Unless you are specifically aware of the fact that Symantec Corporate Edition uses the Intel LanDesk registry keys you wouldn't have recognized it. Additionally once you ran it once, it automatically removed a few of the registry keys without even prompting. My client had stopped at the screen where it was showing that it had detected it and was asking what to do with it. Symantec was already broken. The registry keys that were removed were involved with the licensing. I had to perform the manual uninstall-Reinstall proceedure in order to get Symnantec back up and working.
Apparently this was only the Feb 10th, definitions. He only had the problem on one PC, it had Feb 10th definitions. He had another that had already updated to February 11th, and it didn't have this problem. Additionally after I had fixed the issue on the PC that was effected I forced the update to the Feb 11th defs, and reran the scan. It no longer detected the Registry keys as the virus.