1. Try to manually start the SharePoint 2010 Timer service. 

    For some reason after upgrading from WSS 3.0 SP2 > WSS 3.0 SP3 > SPF 2010 > SPF 2010 SP1, when I tried to manually start this service I received login failed error. 

 2. If you do receive the login failed error, like i did, then reset the login account's password in the computer management.

 3. Again, manually start the service. 

 4. If the timer service starts, then run the SP Configuration Wizard (run as administrator)  

![SP 2010 Timer service][1]



  [1]: https://i.sstatic.net/tSRfg.png