Well I'm back

:
I have 3 error codes it gave 2 times I tried to shut down, it isn't giving them now again.
they are all windows errors and it say to restart my computer from the start menu or hit alt,ctrl,del(which doesn't work) or hit any key to continue(which doesn't work either) then I have to push the restart button on the machine to do anything.
the codes I got were:
Error- 06:05AB:000040B0
Error- 06:05AB:0000CE50
Error- 0D:090F:0000348D
the last one just keep reappearing when you "hit any key".
I have no idea what they mean or why they keep coming?
another question too I was going to clean out my temp folder and noticed that now there are 3 system folders in it. It has the folder for cookies, history, and temporary internet files. I selected all and delete and it says they are system files and some programs won't work. should I leave them there? how did they end up in there anyways?
Thanks, Dreams