I have Registry Backup installed on several of my computers and use it frequently. Most uses are successful at backing up the registry. However, there are times when the program freezes when the backup button is activated. Instead of making the backup, it freezes and cannot be turned off until the computer is rebooted. On one of the computers that runs Windows 7 it freezes every time a backupup is attempted. I have changed the settings every which way with the same result. On those occasions when the backup freezes on any of the other computers, I cannot find a reason for this occurrance. It is random and is usually a once in awhile occurrance that does not reappear after a reboot. Any idea why this happens, particularly on the computer where that is all it does? I have it installed on computers that run Windows XP, Vista, 7 & 8. Two os them have Windows 7 installed and Registry backup seldom freezes on one of them and always freezes on the other.