As a good system admin, I start my day by doing all the routine checks on all of my server and being a system admin in a Windows/Microsoft environment, it is natural to use the admin tools that were available out of the box.
As usual, I’ll open all the admin tools to start my daily checkups and to my surprise, I was prompted “Access is denied for dsa.msc”. I tried to open other admins tools and as expected, I get the same message. I’ve checked my system drive permission and my access level and it seems ok for me. So back to basic, I googled and found a solution to the problem from some forum (sorry can’t remember it but I’ll post the link once I found it).
So here are the steps to gain back the access to your admin tools
1 – go to Start > Run and type in “RegSvr32 MSXML.DLL” and press ok. Repeat the step but replace with “RegSvr32 MSXML2.DLL” and “RegSvr32 MSXML3.DLL”
*Note: Should you get any error during this step, try install Microsoft Core XML Services (MSXML)
2 – Navigate to %SystemRoot%\System32 and look for the files with the .msc extension.
3 – Right click on any of the files and select Properties
4 – Change the open with by clicking on the Change button and browse to %SystermRoot%\system32\mmc.exe and click OK.
5 – Open any of the admin tools to make sure its working
I’m still investigating this issue. It might be a virus but that just my assumption. Will post later if I found something.