How do I get Windows Defender running again

[smirk24]

Windows AIO Repair by tweaking.com is a handy tool but be careful using the program because if you select an option and it runs the repair could also mess up your computer so be sure to only run a repair if you know for sure the repair you select is actually what is needed to be fixed on your computer.

I would check the event logs to see what is being said about windows defender for it may have a way to fix your problem but it could also help you to further your search for a solution also.