Hi All, I got a very teasing Problem, What i noticed yesterday is that my Windows defender is not Starting back after i disabled it, also Security Centre Service is Disabled, User Account Control got disabled when i enable it and restart my computer: Explanation: I Disable my Windows Defender for some software installation, and now i got that the software invited many malwares to hav a party in my system. Now i am unable to re-enable Windows Defender, it says that windows defender is disabled. Additionally windows Security Centre is disbaled, and UAC is set to Never Notify, When i try to enable any of that it is disabled back again automatically. What i tried? 1) I manually tried to enable Security Centre and Windows Defender from Local Services, but useless as it is ) disabled automatically,. 2) Installed and Scanned my System with malwarebytes , removed all treats but still facing the same issue. UAC is disabled automatically, Security Centre is disabled automatically, and ya windows defender will not get started if you have a third party anti-malware soft, i haven't checked that. Any One if know how to fix the Situation kindly Help. Note: I don't to Re-install Windows, as i have to many softs and incomplete projects.