So heres my issue, My MB 13" late 2008 unibody has been running really slowly lately. I want to do a clean install on it and see if wiping out some of the bugs will help to speed it up a bit. I have all the discs and the computer is backed up via timemachine. However the discs I have are for leopard, I upgraded to snow leopard via a friends upgrade disc which I do not possess. Will this present compatibility issues with the backup? Also, when restoring from a time machine backup, are all the buggy files that may be causing the computer to be running slowly going to be reloaded as well rendering this whole process useless? Thanks for the advice!