Windows Security Center - error 1079

See this The windows security center service can't be started.

Let's try one more thing ....
Download Combofix from any of the links below, and save it to your desktop.<--Important
Link 1
Link 2
Link 3

Click on this link Here to see a list of programs that should be disabled.
The list is not all inclusive. If yours is not listed and you don't know how to disable it, please ask.
If your anti-virus or firewall complains, please allow this script to run as it is not malicious.
Next: Disconnect from the internet. If you are on Cable or DSL, unplug your computer from the modem.
Next: Please disable all onboard security programs (all running with back ground protection) as it may hinder the scanner from working.
This includes Antivirus, Firewall, and any Spyware scanners that run in the background.

• Double click combofix.exe and follow the prompts.
• When finished, it will produce a log for you. Post that log and a HiJackthis log in your next reply

Note: Do not mouseclick combofix's window while its running. That may cause it to stall
Please be patient while the scan runs, at times it may appear to stall.
When finished and after reboot (in case it asks to reboot), it should open a log, combofix.txt.
After rebooting ensure your Security applications have been re-enabled.

In your next reply post:
ComboFix.txt
***A guide and tutorial on "How to use Combofix" can be found here:
A guide and tutorial on using ComboFix

Something has become corrupt along the way .. Open an elevated command prompt by right clicking on it and run as Administrator copy and paste sfc /scannow press enter. Tell me if that did anything.

If not, I'm going to suggest either a repair install or a 'clean' install.

Edit to my above post Upload this file c:\windows\system32\wecsvco.dll to
VirSCAN.org - Free Multi-Engine Online Virus Scanner v1.02, Supports 36 AntiVirus Engines!, have it scanned, save the results and post them back here.

You may have to unhide hidden files and folders to find it.

Your Combofix log shows:
2010-12-17 00:03 . 2010-12-17 00:03 58880 --sha-r- c:\windows\system32\wecsvco.dll .... Not wecsvc.dll