Error while opening emails with permission...

Today, while I was trying to read a mail sent with Permissions, I was unable to do it. It threw the following error message...

Your Information Rights Management configuration is invalid and needs to be repaired. For more information, contact your system administrator.

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To isolate this problem, I tried creating a new mail and clicked on Permission button, and I got the same error message. Thankfully, I got it working pretty soon and resolution was pretty simple. Create a .bat file and paste the following... and then execute the batch file.

del /q /f "%ALLUSERSPROFILE%\Application Data\Microsoft\DRM\*.*"
del /q /f "%ALLUSERSPROFILE%\Application Data\Microsoft\DRM\server\*.*"
del /q /f "%USERPROFILE%\Application Data\Microsoft\DRM\*.*"
del /q /f "%USERPROFILE%\Local Settings\Application Data\Microsoft\DRM\*.*"
del /q /f "%SYSTEMROOT%\system32\secrep.dll"
del /q /f "%SYSTEMROOT%\system32\secure*.sst"
attrib -h -s "%SYSTEMROOT%\system32\clockfile.drm"
del /q /f "%SYSTEMROOT%\system32\clockfile.drm"

I use a Vista 64 bit box, and I was able to fix my machine. For more details around this, please visit this link.

Hope this helps,
Rahul