Windows 2012 ASP.NET Event Error 1334

Windows 2012 R2 Standard
ASP.NET
IIS 8.5

This error pops up from time to time

Log Name:      Application
Source:        ASP.NET 2.0.50727.0
Date:          7/5/2015 6:11:01 AM
Event ID:      1334
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      SERV013.FQDN.com
Description:
An unhandled exception occurred and the process was terminated.

Application ID: DefaultDomain

Process ID: 8732

Exception: System.Security.Cryptography.CryptographicException

Message: Keyset does not exist


StackTrace:    at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr)
   at System.Security.Cryptography.SafeKeyHandle._FreeHKey(IntPtr pKeyCtx)
   at System.Security.Cryptography.SafeKeyHandle.ReleaseHandle()
   at System.Runtime.InteropServices.SafeHandle.InternalFinalize()
   at System.Runtime.InteropServices.SafeHandle.Dispose(Boolean disposing)
   at System.Runtime.InteropServices.SafeHandle.Finalize()
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="ASP.NET 2.0.50727.0" />
    <EventID Qualifiers="49152">1334</EventID>
    <Level>2</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-07-05T10:11:01.000000000Z" />
    <EventRecordID>29051</EventRecordID>
    <Channel>Application</Channel>
    <Computer>SERV013.FQDN.com</Computer>
    <Security />
  </System>
  <EventData>
    <Data>An unhandled exception occurred and the process was terminated.

Application ID: DefaultDomain

Process ID: 8732

Exception: System.Security.Cryptography.CryptographicException

Message: Keyset does not exist


StackTrace:    at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr)
   at System.Security.Cryptography.SafeKeyHandle._FreeHKey(IntPtr pKeyCtx)
   at System.Security.Cryptography.SafeKeyHandle.ReleaseHandle()
   at System.Runtime.InteropServices.SafeHandle.InternalFinalize()
   at System.Runtime.InteropServices.SafeHandle.Dispose(Boolean disposing)
   at System.Runtime.InteropServices.SafeHandle.Finalize()</Data>
  </EventData>
</Event>

Reported this a while back so I am opening it again.

I found this
https://msdn.microsoft.com/en-us/library/aa702621.aspx


How to retrieve thumb Print
https://msdn.microsoft.com/en-us/library/ms734695.aspx
User.FindPrivateKey My CurrentUser -n "CN=localhost" -a
findprivatekey.exe My CurrentUser -t "46 dd 0e 7a ed 0b 7a 31 9b 02 a3 a0 43 7a d8 3f 60 40 92 9d" -a

cacls.exe "C:\Documents and Settings\All Users\Application Data\Microsoft\Crypto\RSA\MachineKeys\8aeda5eb81555f14f8f9960745b5a40d_38f7de48-5ee9-452d-8a5a-92789d7110b1" /E /G "NETWORK SERVICE":R

It took me awhile to find "FindPrivateKey.EXE" but I now have it if anyone needs it you can find it here
http://blog.rhysgoodwin.com/windows-admin/findprivatekey-exe-pre-compiled/

so I ran the one above
C:\Util>findprivatekey My currentuser -n "CN=localhost" -a
FindPrivateKey failed for the following reason:
No certificates with key 'CN=localhost' found in the store.

Use /? option for help


I need to find which thumb pint it is so I can issue the cacls command

Also the path in the cacls is not correct for Windows 2012 Server after research I found the location of the machinekeys

C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys

I found another article that said to give administrators and system full control

I tried that and I received access denied on the machinekeys


So my questions are this

1. how to use the findprivtekey.exe properly to obtain the thumb print then the cacls command should work?

2.  Why can't I add permissions to the folder "C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys" access denied




Thanks

Tom