The exclamation point and diagonal lines mean you have “Range Check” activated. Press ctrl-z to get rid of that. That is just to warn you if you have colors that are illegal for broadcast.
Your scratch disk (for Render Files) and the location of your autosave is user configurable, so if somebody else modified this on your edit station, that could account for why you can’t find the auto save.
I would try using the finder to location your autosaves. Just search “autosave” to pull up all the autosave folders you might have, and go trolling for a file name that roughly matches your project.
The odds of this being a virus are next to none, though it wouldn’t be a bad idea to try repairing disk permissions in the disk utility. Also, as Rafeal mentioned, AVIs perform horribly in FCP and we’d all urge you to use mpeg streamclip to convert it to an MOV. DV/DVCPRO compression will probably be your best bet. DO NOT use h.264 or photo jpeg.
Do you keep a copy of your project on a flash drive, or are they saved to the mac’s local hard drive? If they are kept on the macs hard drive, it’s not entirely inconceivable that somebody may have opened your project, accidentally screwed with your project. Closed (and saved in the process) and left you with a messed up project. This happened left and right to people when I was in college. Hope any of this helps.
Richard Sanchez
North Hollywood, CA
“We are the facilitators of our own creative evolution.” – Bill Hicks