Error 711: Cannot load Remote Access Service Connection Manager
and
Error 1068: the dependency service or group failed to start and cannot start the remote access connection manager service.
There is no need to upgrade your windows.
You will have to do this five steps
1. Give full security rights to folder c:\windows (select in the Change Permission "this folder, subfolders and files")
2. Restart PC
3. Delete folder C:\Windows\System32\LogFiles\WMI
4. Restart PC
5. Try starting Remote Access Connection Manager service (or VPN for those who can't start VPN )