Solution: The problem is caused by the local wss_wpg server account not having write access to the %windir%\tasks folder, usually c:\windows\tasks folder. This folder is used by Windows Task Scheduler. So to fix the problem the wss_wpg account needs to be given write access to the c:\windows\tasks folder on the index server.
Note: The c:\windows\tasks folder is a hidden folder by default.
- On Index Server or all server in farm
- Open a command prompt and type attrib -s %windir%\tasks
- Browse to %windir%\tasks, right click and select properties. Add the WSS_WPG group and grant Read & Write permissions on the tasks folder.
- Open a command prompt and type attrib +s %windir% \tasks