Several times I've seen the task manager appear frozen in Windows 8. It doesn't update, and generally shows double-digit CPU usage. Closing it and reopening it doesn't usually help, but rebooting generally does. How does this happen, and how do I fix it?
I can confirm that the task manager update speed is changed to "Paused" (Windows 8 Enterprise, not sure if this also happens in Windows 8.1) when the screen saver is activated.
Personally I consider this a bug because the the update remains paused after the screen is unlocked.