@RockmanNeo, Welcome to sevenforums
You can follow any of the method mentioned below to get rid of this problem:
Method 1 (I used it):
I had manually the backed up registry just after installation. I just restored it. (you can see our tutorial section how to back up the registry and restore it). Method 2
(I advised one person in another forum, which worked well, she had no manual backup of the registry; system restore and reg check failed to detect the issue):
1. Uninstall Windows Live Essentials using Any third party tool. She used Yamicsoft Windows 7 Manager (Trial) as per my advice. Open the Smart un installer and select the Windows logo saying "Windows Live essentials 2011" (or something like that). All components will be un installed. Next, the smart un installer will ask for a scan for redundant files. Run it and delete the found files.
Now, check the registry for any errors (Please see tutorial sections) after the restart. If you find error, but can not fix yourself, please post on BSOD section of this forum for the fix.
2. Download Windows Live Essentials 2011 and select to install it.
3. Restart. It should work fine.