Out of nowhere I am starting to get a lot of complaints from my customers with "a file is locked" error or "cursor is read only". I'm talking about customers that have not had an update for over 6 years and new customers so I know it's not my software. Has anyone else seen this? My guess is M$ put out an update? I'm getting this on 6 year old XP PCs and new Win 7 PCs. Any guesses? Maybe an anti-virus program? Hmmm, just realized a lot of them are running M$ Security Essentials but I can't say for sure it's all of them.

Any idea is very appreciated.