Problem with STAS uninstall

Question

Hi all, 
 
 I have installed STAS version 2.2.0.0 on a 2008R2 DC. Now I wanted to upgrade that installation to version 2.5.0.0 
 If I run the new setup file I keep getting the message " STAS is running, Please close the application and try again ". But the STAS Config is closed and the STAS service is stopped and set to "Disabled". I have no clue why I keep getting this error message. 
 If I try to uninstall STAS first, I get the same message. Also I tried to restart the server... nothing helps. 
 
 Has anyone had a similar problem? 
 
 Thanks for your help.

polyrack · Answer

Hi, 
 I tried a lot of things. I had the same problem on all other DC's, even with the actual version 2.5.0.0 
 I even tried to use a uninstall tool, to force uninstallation. After that I still got the same message. 
 
 What I had to do to, to do a new install, was to delete all registry keys under HKLM\SOFTWARE\Wow6432Node\Sophos