I changed explorer.dll in Windows 7. Then explorer wouldn't start when I tried to do so from task manager. So I tried to reboot. After also being unable to make headway in safe mode (using msconfig), as that also requires explorer, I launched startup repair using my windows 7 CD. Then after it said that it would reboot and fix any additional problems, it has kept rebooting and failing. I can't get to safe mode using f8 either, it just comes up with boot options 'Boot from CD' and 'Boot from HDD'.
Any help will be appreciated. If I can get out of startup repair, that would be tremendous. At least then I can activate word from task manager and save my coursework!
I'm going to try using Ubuntu's explorer to change the files back. I'll post back any progress! I'll be checking this wall at least 5 times a day until a solution is found.
Godspeed you wonderful people!