Do I need to use KeyCleaner?
 

My USB mode on my psp doesent work when I go under game/memorystick also the time when its 12:00 says its 0:00. Will this fix it? I downgraded using the 3.50 Lumines downgrader by Noobz, and I have a TA motherboard.

if all went as it used to, than NO. your Keys should be just fine.
but after all you can run it and check the key status. it`s not dangerouse at all.

All my keys are okay it says, But key 0x0005 is "Unknown status", what does this mean?

BrandonM33 - it's ok, you used NOOBZ Team 3.50 downgrader, keycleaner can't recognize the key 5, patched by this downgrader. This problem will be fixed in future keycleaner versions.