You dont actually tell us what the problem is that you are having. we cant offer you real help if you dont tell us in as precise detail as you can exactly what issues you are experiencing and what exactly you have tried to rectify them.
My crystal ball is in for a service this week
Default Windows 7 SP1 Services - Start Keys by Black Viper
http://www.blackviper.com/category/guides/windows-7/have a read , scroll down, download and run the appropriate reg key file for you version of Win7
note: these only set the startup type for the default services back to the default startup state, they will not fix damaged and missing registry entries and keys, for damaged/missing entries you are going to have to re-install the software associated with them. Depending on what damage you have done you may be looking at a repair install of you OS and other software.
