Hey there. I'm new to the forum. First and foremost I want to let everyone know I'm not that computer savvy so I may have to ask what certain things mean depending on the response, and I'm sorry if this topic has been discussed to death elsewhere. I looked around and found some similar issues on this forum, but ultimately I thought it would be best to post my specific case as the answers may help me fix my computer more efficiently. In any case, recently I contracted a virus on my computer described as Vista Security 2012. Basically it's a virus that disguises itself as a legitimate security program and says your computer has a bunch of problems with it's security when it really doesn't. Basically I got rid of the virus using this uninstall guide: http://www.bleepingcomputer.com/virus-removal/remove-vista-security-2012 It worked. But now I have another issue. Windows Security Center has been deactivated and I can't reactivate it. I tried looking through the Services folder on my computer, but the option is not even listed in there. Also, my Windows Firewall and Windows defender is down. I'm not sure if using Malwarebytes to finish the cleaning of my computer had something to do with it or one of the files I downloaded from the uninstall guide I listed earlier had something to do with it. I know one of those files was a registry-altering file and I'm guessing that is what the problem was. The file is called RKill. Sounds fitting. Anyways, I'd really appreciate it if you guys could help me out with this one. I'm not sure what to do next. I don't know if posting the logs of the scan I did with Malwarebytes to rid my computer of the virus will help or not. Thanks in advance.