I had a look in Google, all those seem to be connected to different applications. It could be the registry has been corrupted. Try installing an earlier registry.
Switch the computer on and keep tapping the F8 key, go down the menu to start at command prompt and type scanreg/restore or scanreg/ restore, you'll have to try with or without the space depending which works on your computer. Then select an earlier date from the list when the computer was working correctly. Re-boot and see if that works.