This one's weird. No matter what Excel spreadsheet I try to open, I get this notice: "The file cannot be opened because your virus scanner has detected a problem with the file."
If I try to open any Word document, I get this notice: "The file 'FileName.docx' is not available."
If I try to open any PowerPoint presentation, I get this notice: "PowerPoint can't read [full path name]". Then there's an option for more details and it says something about my anti virus software.
This happens with ANY office file. Old files, new files, even a file I create right now and save cannot be opened.
I use the fully paid AVG 8.0 suite for anti virus, spyware, firewall, etc. and it's always up to date.
It gets weirder - I cannot open AVG. And there's no AVG icon in the tray like there usually is. And Windows Security Alerts is telling me that AVG's Malware is telling it that it (AVG) might be out of date. Clicking "Update" does nothing.
I uninstalled the six Windows updates that came in today and rebooted, the Office files still won't open.
I even rolled my computer back (system restore) to three days ago and I can't open Office files and I can't get at AVG.
I guess the last desperate measure is uninstall AVG, then find the installation file and try to reinstall.