Using Win XP SP3. Started getting this error. I feel it is some OS file corruption. I have performed a OS Repair and have reloaded Windows .NET v4. Have always used several anti-spyware and anti-virus programs reguarly. Computer seems to have history of getting file corruption from time to time. I think it is because of power outages (last few seconds). We seem to get alot of them. I am using a APC UPC but it is about 7 yrs old. Found several references in forum, but most are from posts years ago and different situations. I am finding many applications that when start give this error. Not sure what is commonly being invoked at program startup or what I need to reload since a Win XP Repair did not resolve. I know Win XP support expires soon, and will move to Win 7, but need many programs to run again to prepare move.