Windows Update will not work, getting error 0x80240022
I cannot download Windows Update, either one at a time or in groups. When I try to fix it with MS Security Essentials, I keep getting one of two error messages: Error Code 0x80070424 or Error Code 0x80240022. I have
27 important updates since June that won't download. Also, my Windows Firewall will not turn on or off properly. Help, anyone?