I have had occasional and apparently random crashes of the Control Center of this AV/firewall program. It's more of an annoyance than anything else, since the AVG tech support assures me that protection is still provided even when the Control Center is shut down, and I am able to restart the Control Center manually with no difficulty. Recent exchanges with AVG tech support indicated the problem lies with the mfc71.dll, and they recommended downloading a fresh copy to place in the Systems32 folder. My concern about doing this is that the "new" download appears to be an older version than the one I have currently. The version currently on my system has a modification date of 7/11/2006, version 7.10.6030.0 while the suggested replacement has a mod date of 3/18/2003 and is version 7.10.3077.0 I suspect the later version currently on my system came through a Windows update. Is it wise to replace this newer mfc71.dll with the older one?