task_manager_change_priority This is for those who want to change the priority or processor affinity of some process through Task Manager but they get an error message saying

The operation could not be completed.
Access is denied

This problem generally arises because some processes are run by the system and therefore Windows does not allow a “User” to change their priority.

A simple workaround is to run the Task manager by giving it System level access. (Thanks : Life in 0 and 1)

  1. Open a ‘Command Prompt’ window by going to Start -> Run then type ‘cmd’ then press enter
  2. Type “ntsd -c qd taskmgr” in the command prompt