If you use Solid State Digital drives (SSDs), it may be worthwhile to disable the Task Scheduler Trim command in Windows 8, as Microsoft does not seem to have implemented it correctly. See this post:
Go to Task Scheduler, look in the Microsoft folder for the "Defrag" entry in the folder and right click on it to disable it. Then create a new task to implement the Trim command on SSD drives the right way:
C:\Windows\System32\Defrag.exe c: /L
Where C: is the drive you want to trim.
Another task that may be worth modifying is WinSAT.exe, since Windows 8.1 no longer displays the Window Experience Index rating on the System Properties page, Correct me if I'm wrong, but because of the absence of WEI I don't see any reason to run WinSAT.exe any more, which is under the \Microsoft\Windows\Maintenance folder in Task Scheduler.
Edited by lurk&jerk, 02 November 2013 - 07:03 AM.