After After upgrading from 11.3.6 SP4 to 11.3.6 SP6 . when trying to start web services thru 'services' the following popup is seen:
Windows could not start the CA Workload Automation AE Web Server (xxx) service on Local Computer 
Error 1053: The service did not respond to the start or control request in a timely fashion 

What is the problem and how can it be resolved?

Product - Workload Automation AE 11.3.x.
Platform - Windows
Database - Oracle, Sybase, SQL
 

Select Properties on the Windows service 'CA Workload Automation AE Web Server' .
See if the path to the executable contains spaces in any of the directory names.
If it does enclose the value in double quotes.

Use the Windows utility regedit to adjust the key
Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\CA Workload AutomationAE Web Server(xxx)
Modify the field 'ImagePath' 

Example:
"D:\Program Files (x86)\CA\Workload Automation AE\webserver\bin\wrapper.exe" -s "D:\Program Files (x86)\CA\Workload Automation AE\webserver\conf\wrapper.conf"

After implementing this change the service for 'CA Workload Automation AE Web Server' should start.