Cannot log on to modern warfare or black ops

modern warfare and black ops have not run for 2 days start to load and then crash,
today update arrived tried to run games and at last allowed to get in. logged of for some lunch and again cannot run either game. does anybody know what is going on tried rebooting router and nothing

Hi, make sure there are no windows updates and run app in admin

checked no updates and tried to run as admin still no joy, runs fine but as soon as i try to play either black ops or modern warfare freezes at splash screen only been doing it since weekend and after update yesterday briefly worked then stopped again