I am not able to open the 'Tomcat6' service on Windows Vista / 7 / 8.
If you receive the error message:
Unable to open the service 'Tomcat6'
when starting Tomcat on Windows Vista / 7 / 8, this is likely caused by Windows User Access Control (UAC). To solve the problem, run Tomcat as an administrator (either by logging into Windows as an administrator or by right-clicking on the Tomcat Monitor and running this as an administrator. Alternatively, disabling UAC should also solve the problem.
You can find more information on UAC here:
Windows Vista: http://technet.microsoft.com/en-us/library/cc709628%28WS.10%29.aspx
Windows 7: http://technet.microsoft.com/en-us/library/cc709691%28WS.10%29.aspx
Windows 8: http://blogs.msdn.com/b/hyperyash/archive/2012/07/18/disabling-user-account-control-in-windows-8.aspx