Also obvious, but in case not aware, there is a function for your AV program to scan all your office doc/xls and so on when you load them into Word, Excel to make sure no viruses/macros, etc were tagging along. However in the past this feature would cause such a slow down in loading a complex doc/spreadsheet that I manually scanned them once they left the tight security of my network. Anything that I didn't create and kept only on my system always was heavily checked before I would let it near my Office apps. With routine scanning that has been enough to keep my Office program doing what it was designed to do and not playing the gremlin in my computer.
In NIS 2011, when you click on settings the first screen that shows up Computer Settings, under Computer Scans you have
Smart Def.
Compressed Files Scan
Intell skip scan
remove infected comp. files
MICROSOFT OFFICE AUTOMATIC SCAN (no not yelling) where you should have it in the default setting of "on" unless you or your system config/IT/OEM/retail store changed it too "off".
