I did a search on the error code 0xc0000020 and it returned a LOT of responses for a variety of programs. It seems like the issue is Microsoft-related, although I believe it's a SONAR-generated DDL.
Here's what I'd do in your position, which is based on guesswork, not on having fixed it...
1. Install the latest SONAR update. Maybe it will overwrite the file and Windows will be happy again.
2. I have SONAR on two different computers. Sometimes when a DLL goes rogue, I copy it from the computer that doesn't have an issue and replace the rogue DLL.
3. If you don't need to do DSD conversions, locate the DLL, change the name to DSDConvert.dlx, and see if SONAR opens.
4. Finally
here's the solution that Microsoft seems fond of recommending.
Good luck! Hope this helps.