Now you have them all over the map etc? If you did not have then before what changed? Have you installed any new program or program updates, changed video settings for example?
Maybe some background program is using the same hot keys or maybe you need to check in the Key bindings that they are assigned still - perhaps you reassigned (and it goes without saying remove any modifications you may have).
Could be you have some hard drive or memory corruption too. Scan your disk for errors, and check the memory.
Moving to technical.