DotNetNuke 4.9.4 on IIS7  This issue just started happening about 2 weeks ago, we checked and we cannot locate any files that we changed due to upgrades.  I am desperate at this point.

Symptom:
1. User attempts to register, fills out the form and required fields then clicks the "Register" link at the bottom of the page.
2. After about 20 seconds, a message is displayed stating that the user name is already in use and the user cannot proceed.

What is actually happening under the hood:
1. User clicks register and the system creates the user account.
2. The following log entry is registered in the Windows Application Log.
Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8
Faulting module name: KERNELBASE.dll, version: 6.1.7601.17651, time stamp: 0x4e211319
Exception code: 0xe053534f
Fault offset: 0x0000b9bc
Faulting process id: 0x%9
Faulting application start time: 0x%10
Faulting application path: %11
Faulting module path: %12
Report Id: %13

I researched this exception and found a number of very UNHELPFUL articles about DebugDiag and also the Target CPU.  

HELP!

Shawn Nanto

Oddly enough it the error just stopped happening, and now it's working again.  I didn't do anything.

I would like to know what happened, but I will just close this issue for the time being unless it starts happening again.  24 hour have passed since I reported this issue, and we've had 16 new user registrations without any problems.

Thanks.

Shawn