A few days ago my PC started acting strangely. I keep getting notifications from windows action center telling me to enable virus protection and a firewall. When I try to enable my virus protection software (Norton 360) it does nothing and when I try to enable windows firewall I get the message "Action Center can't turn on Windows Firewall." Then when I click on "Turn Windows Firewall on manually." it tells me to Update my firewall settings, so clicked on "Use recommended settings" and it comes up with the message "Windows Firewall can't change some of your settings. Error code 0x8007042c." When I try to open Norton, nothing happens and Windows tells me that it is turned off but I can't open it in anyway. I also cannot download any Anti-virus software as the download will crash. I even tried doing a scan from Norton Bootable Recovery Tools but the scan gets stuck on "Preparing Scan". I looked this up and apparently this is because the infection is stopping Norton from accessing my drive? I can download malware removal tools though such as MalwareBytes and Spybot Search & Destroy but any programs like this tell me that there is no problem with my computer or my computer will BSOD or the scan will crash. I also get BSODs frequently, all with different errors and I can't keep any program open for more then half an hour without it crashing and anytime I try to run a program like Norton Power Eraser it crashes! I also got an error on Internet Explorer which said "A malfunctioning or malicious add-on has caused Internet Explorer to close this webpage" and when I tried to click on "Manage Add-ons" I got a BSOD! After this BSOD I tried to go on "manage add-ons" again but every time I tried Internet Explorer would crash. I restarted the PC and tried again and this time I got onto the manage add ons but I could not see anything that could be harmful. I have no idea what to do as I have tried everything. Please help!