OK Dr watson lets now see if the major file is there ;D
Do you have a file named wscui.cpl in Windows\system32 folder?
If it exists, double click it to run Security Center.
If the file is missing, please copy it from another known computer.
THEN
Type: regedit and hit enter
Navigate to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\wscsvc
Is that key present - if not let me know and I will give you an export of mine