This issue may occur if a 64-bit version of Office was installed on a computer and later replaced with a 32-bit version, and if the preview feature is being used in Windows Explorer.

The removal of the 64-bit version of Office may not clean up all registry values correctly, leaving remnants that cause this error. To resolve the issue, you need to delete the following registry keys (make sure to back up the registry first):

• HKEY_CLASSES_ROOT\CLSID\{00020827-0000-0000-C000-000000000046}
• HKEY_CLASSES_ROOT\CLSID\{65235197-874B-4A07-BDC5-E65EA825B718}
• HKEY_CLASSES_ROOT\CLSID\{84F66100-FF7C-4fb4-B0C0-02CD7FB668FE}

Details of the error can be found in the element below:

Detailed technical information follows: 
---
(Inner Exception)
Date and Time:         <Datum>
Machine Name:          <ComputerName>
IP Address:            <IP>
Current User:          <UserName>

Application Domain:    C:\Program Files\eformity\Microsoft Office Add-In\
Assembly Codebase:     file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
Assembly Full Name:    mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Assembly Version:      4.0.0.0

Exception Source:      mscorlib
Exception Type:        System.Security.SecurityException
Exception Message:     Aangevraagde registertoegang is niet toegestaan.
Exception Target Site: ThrowSecurityException

---- Stack Trace ----
   System.ThrowHelper.ThrowSecurityException(resource As ExceptionResource)
       mscorlib.dll: N 0016 (0x10) IL 
   Microsoft.Win32.RegistryKey.OpenSubKey(name As String, writable As Boolean)
       mscorlib.dll: N 0000 (0x0) IL 
   AddinExpress.Projects.Common.ADXRegistry.OpenKey(name As String, writable As Boolean)
       mscorlib.dll: N 0192 (0xC0) IL 

(Outer Exception)
Date and Time:         <Datum>
Machine Name:          <ComputerName>
IP Address:            <IP>
Current User:          <UserName>

Application Domain:    C:\Program Files\eformity\Microsoft Office Add-In\
Assembly Codebase:     file:///C:/Program Files/eformity/Microsoft Office Add-In/AddinExpress.MSO.2005.DLL
Assembly Full Name:    AddinExpress.MSO.2005, Version=10.1.4701.0, Culture=neutral, PublicKeyToken=4416dd98f0861965
Assembly Version:      10.1.4701.0

Exception Source:      AddinExpress.MSO.2005
Exception Type:        System.Exception
Exception Message:     OpenKey failed.
Exception Target Site: OpenKey

---- Stack Trace ----
   AddinExpress.Projects.Common.ADXRegistry.OpenKey(name As String, writable As Boolean)
       AddinExpress.MSO.2005.DLL: N 0292 (0x124) IL 
   AddinExpress.MSO.ADXAddinModule.AddinExpress.MSO.IDTExtensibility2.OnStartupComplete(custom As Array&)
       AddinExpress.MSO.2005.DLL: N 1454 (0x5AE) IL