I have investigated the AutoCAD 2007 mfc80u.dll error (FATAL ERROR: Unhandled e06d7363h Exception at 7592b737h) when opening files and using the recent files option. I have conquered this error in a previous installation, but recently had to reinstall and this error will not go away. I have searched my C: drive for all instances of this file. I have 7 different versions (in 8 locations). They vary (.1833, .762, .3079, .42, .762, .4027 & .4053) and via ProcessExplorer, it reports AutoCAD is using version .4053. In the process of investigating, I've seen a command line to uninstall VC2005 amoung other things. My question is which file version is correct? How do i manually make sure the most recent/correct version is good, not corrupt, etc.? And remove any others that may be playing havoc in my system. I have a screen shot of found file, but don't know how to post it. TIA.