Windows - ActiveX: ActiveX is enabled on IE but does not work

Other possible symptoms:

- unable to access MMC console (access rights message error, although having administrator rights) and/or unable to save a new one ("MMC cannot save the console");
- windows update not working or crashing the IE browser;
- msn messenger unable to connect.

Solution:
Go to Start -> Run and write: regsvr32 MSXML3.dll and click OK.