Can not turn on Windows Security Center Service

i am also having this problem i did do sfc/scannow with no luck then went into services it was disabled i enabled it and restarted computer it is now disabled again so i enabled it again an was able to turn security centre back on but after a minute or 2 it turns its self back off ?

edit..also with system restore is turned off and disk protection turned on , made a restore point it was sucessfull then i couldnt go no furter

edit , found 8 trojans with malwarebytes removed sucessfully

found 1 with avast

edit, ran sfc/verifyonly

result , windows resource protection found integrity violations ?

not got a clue what that means

HappyFacePCs

I had the same exact problem with the Security Center automatic disabling issue on my XP Home Premium SP3 Dell tower. I too ran complete Malwarebytes and SuperAntispyware scans and cleaned everything found BUT the problem persisted.
ALAS the fix!!! After 2 days of Googling and trying HijackThis and SpyBot here is what worked for me...
You need to first download and install Microsoft Security Essentials and then download the latest MSE updates file separately becauase the virus does NOT allow the updates to MSE to be applied otherwise. In fact, this driver virus will NOT even allow MSE to start!! Once you have the updates applied reboot into Safe Mode and log into the Administrator account (God Mode!!). Then run an MSE scan and it will find and clean-up the bad drivers. The reason all the other tools do NOT work is because the virus is disguised as a Microsoft driver which gets loaded on boot-up BUT MSE is able to detect and clean that!! Once clean in Safe Mode reboot into normal mode and keep running MSE scans until you get a clean scan.
Problem solved!!!
ALAS Sir Malmare!!! You fought valiantly but revenge is SWEET!!!
HappyFacePCs.com