SCEP not installing

[Kevin79]

I having an issue with SCEP on a few of my Windows XP machines. They all had SCEP installed on them with SCCM 2012. I upgraded my environment to SCCM 2012 SP1 so there was a new version of SCEP. The computers were set to automatically update the SCCM and SCEP clients. Most computers updated fine. I have 3 though that won't install the new version though. SCCM uninstalled the old version automatically but when trying to install the new version it fails. When I try to install it manually, it either asks for the path to a file (epp.msi or FEPClient.msi) and no matter where I point it to, it says that the file is not a valid installation package and won't let me continue or it fails with the error code 0x80070645. I search Google but didn't find anything helpful. Does anyone know how to fix this?

[Rocket Man]

Has the contents of C:\ProgramData\Microsoft\Microsoft Antimalware folder been fully erased.. and all regkeys associated with the old version been removed?

[Kevin79]

Yes and yes.

[Lucid]

Hmm are you sure those three clients had SCEP and not something else installed previously? You might try searching the registry for those other .MSI file names and see if that turns up something.

 

And does the registry info in this post help (in the MSREMOVAL.TXT section)?

http://answers.microsoft.com/en-us/protect/forum/mse-protect_start/mse-client-update-failed-getting-error-message/3bfacf9a-eb78-4593-b6cb-1cec17f3fe0d

 

Or maybe the registry keys mentioned in the threads here:

http://answers.microsoft.com/en-us/protect/forum/mse-protect_start/mse-install-error-code-0x80070645/07b750da-341a-44b6-887f-39c9c11353ed

[Kevin79]

Yes, they had them previously. I also checked those two links and they didn't help any.