I have an issue with Windows Security Essentials: It won't let me update. There is no error message or anything, it just won't let me update. I usually update with no problems, and when I do get an error message, I restart my computer and I can update with no problem. I tried to uninstall and re-install (which I did) but it still won't let me update. How do I fix this issue? Any help would be much appreciated.