I have windows 7 64 bit. I restored my computer backup from 5-7-13 due to the fact windows defender was giving me a problem not opening when I clicked on the icon and nothing happens. The restore worked fine along with windows defender I was able to click the icon and it opened up with the menu
After the restore I checked for updates I had 10 outstanding for windows and others and windows defender kb915597 definition 1.151.173 I installed all that were on the updates and completed successfully.
I then clicked the icon for windows defender and nothing happens I checked the services tried to start and stop windows defender and get error 15100 failed to read description.
My question to you...can a bad kb915597 update cause this problem? Any help to solve this issue is greatly appreciated.