Hello DH1,
Sorry if this is a lame, generic inquiry but I'm just trying to do some advanced "prep" work here....
This summer I bought my Mom, who lives out of state, a new PC, set it up for her (including installing a _free_ version of AVG. It seems Mom recently "fell" for installing the paid-for version. Her trial period for that version has expired.
Mom is nowhere near technical enough to uninstall a program. I'll be at her house for a few short days over Christmas and plan to uninstall the paid-for version and re-install AVG Free.
I've read many reports indicating uninstalling AVG is/may be problematic. Should I expect any complications? As mentioned, I am going to have very little time to tinker with her PC.
Thanks in advance for any insight.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic