Dynamics CRM 2011 Error

after windows updates on our CRM server all users are getting the following message:

An error has occurred.
Try this action again. If the problem continues, check the Microsoft Dynamics CRM Community for solutions or contact your organization's Microsoft Dynamics CRM Administrator. Finally, you can contact Microsoft Support

i have been searching all over for the solution; any and all help is greatly appreciated

David ElebuteSystems ConsultantAsked:
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Greg BessoIT Solutions EngineerCommented:
Do you have a screenshot of the error, or at which point it comes up? Is it upon logging in, or even before logging in?
David ElebuteSystems ConsultantAuthor Commented:
before I get a login prompt
Greg BessoIT Solutions EngineerCommented:
Do you know if there were any CRM update rollups applied by any chance? If you can go to the server, go to Programs and Features and look at all the recently installed items sorted by Installed On. Also then check the Installed Updates view for the same. Anything for CRM that was modified?

Also check Event Viewer Application and System logs, is anything related to CRM logged there?

Finally, consider enabling CRM tracing to see if details are captured that might help pinpoint the root cause: https://support.microsoft.com/en-us/kb/907490

Other things worth considering, is your CRM environment a "simple" one with just one server, do you have SQL and the application or separate servers, are you using IFD to connect or just the plain vanilla login method?

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David ElebuteSystems ConsultantAuthor Commented:
we didn't do any updates to CRM, only input of data
no CRM update rollups or anything else updated recently either
looking over the event viewer application and system logs nothing jumps out so far
single server windows 2008 r2 enterprise only running the dynamics 2011 nothing else
Greg BessoIT Solutions EngineerCommented:
If possible, check which updates you applied. There may be a known conflict (or not known one). I would try enabling the CRM tracing to find out what is going on if issues persist.
David ElebuteSystems ConsultantAuthor Commented:
I have enabled the trace but am not seeing anything in the logs
looking over the updates, all are important or recommended
only optional are KB3080079 - update for update for windows server 2008 r2 x64 and KB3102429 - update for windows server 2008 r2 x64
getting this is in event viewer
CrmTrace encountered an error. Additional Info:Error in GetFileName : Error accessing file c:\crmdrop\logs\CRM_SRVR-w3wp(4524#FB92673C)-CRMWeb-20160210-1.log (Reporting Process:w3wp, AppDomain:C:\Program Files\Microsoft Dynamics CRM\CRMWeb\)
also have this going in event viewer
Login failed for user 'NT AUTHORITY\SYSTEM'. Reason: Failed to open the explicitly specified database. [CLIENT:]

checking the errors in event viewer
David ElebuteSystems ConsultantAuthor Commented:
able to find the cause after i got the trace working properly
found that some permissions were deleted due to domain controller being down for an extended period of time
once i setup the permissions again in the AD organizational unit (OU) for the CRM all is working
thank you again for your help and advice

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