A friend who lives a considerable distance away has a problem with his monitor. After a series of problems, the display settings have changed to a resolution and/or frequency that the monitor doesn't support.
He's not at all computer-savvy (even less than me!) so I'm reluctant to suggest that he starts dabbling in the display settings. If I suggest that he uses System Restore to roll back to a time before the problem, will that restore his previous display settings?