I've been getting this error from Windows Defender saying that "real time protection couldn't be turned on". I've tried activating it from the action center alerts and from the big red button in the program itself, but no dice. I've never used any other AV software on this 3-day-old computer and the only things I've downloaded are 3 games via the steam client, so I'm fairly certain that I don't have any malware. In the windows defender settings, the option to turn on real-time protection is checked. One "solution" instructed me to modify the registry through regedit at the directory HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender, but the problem is that I cannot find a folder named "windows defender" at that location. Opening the services window shows that the "Windows Defender Service" is Running with an Automatic startup type. Additionally, Internet Explorer refuses to open without any alert or error while Chrome is working just fine. I'm running Windows 8.1.
I've been searching around for quite a while now without any luck, so if anyone can help me it would be much appreciated.