I have the same problem but not the exact same speeds. To change it back when you turn on the comp press delete and it should take you to setup if not then find the buttong u have to press. Then go to performance or p+p settings or something similar. It should have a line whichc says CPU Speed. Mine says 100/100 Mhz but when i tap the '+' sign twice on the number pad it goes to 133/133 Mhz and then when i save the changes it goes back to the original speed im not sure wehy it does this but its usually happenes when theres an error or its locked up and i have to turn it off manually. Don't touch anything else or anythign that ur not sure about, other wise u mite change something wrong but if it sounds similar to my case then try it.