I am unable to get Windows Defender to turn on (he had been on, then returned to off) simply don't respond to a click.

Windows Defender is disabled; I can't not do back on... no response when I click.

Windows Defender cannot be used with AVG, McAfee, MSE or Norton.  It is part of the Vista and Win 7 operating system and cannot be uninstalled.  It must be uninstalled XP if you use AVG, McAfee, MSE and Norton.

http://Windows.Microsoft.com/en-us/Windows-Vista/turn-Windows-Defender-on-or-off

Windows Defender and Microsoft Security Essentials

If this does not solve your problem, please post back and elaborate detailed about your computer, AV programs, etc...

Tags: Windows

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