Random .NET Application Crash in Windows 7 Pro x64

We just rolled out a dozen XPS 8700 with factory installed Windows 7 Pro X64 and they randomly crash AutoCAD with an error that reports the faulting module to be CLR.DLL which is related to the .NET framework. We completely removed and reinstalled .NET and the problem still persists of multiple unexpected crashes throughout the day. There is a page on Microsoft.com that eludes to a Hotfix that can be requested (not readily available for download) http://support.microsoft.com/kb/2640103 but I have no reason to think that will be any better than having used the .NET removal tool, restarting, and resintalling .NET. Does anyone have any ideas what to do about this? AutoCAD has worked just fine on the previous machine that we had running Windows 7 Pro x86. Details of the error found in the applications log: + System - Provider [ Name] Application Error - EventID 1000 [ Qualifiers] 0 Level 2 Task 100 Keywords 0x80000000000000 - TimeCreated [ SystemTime] 2014-06-23T14:44:10.000000000Z EventRecordID 2943 Channel Application Computer XXX-56 Security - EventData acadlt.exe 24.0.59.0 4a11134e clr.dll 4.0.30319.18444 52717f9a c00000fd 00000000004e7fe8