Download and run frewware malwarebytes. Run a full scan, let it clean whatever it wants.
Then run a sfc scan 3-4 times. SFC /SCANNOW Command - System File Checker
After following the above steps, try opening the services console and start the services. If you still get an access denied error, navigate to C:\windows\system32 folder, the locate services.msc, right click on that then click Run as administrator. Provide the admin password if asked to.
Also exactly which services are you enable to start? And how is the computer bothering you?