Display Alan 28 I'm Using Windows 98 And Some How Changed The Monitor Were It Displays Sideways. How Do I Get It Back. Alan?

I'm using Windows 98 and some how changed the monitor were it displays sideways. How do I get it back. Alan? - display alan 28

Our team here at work will reset the monitor, most of the time when you need to restart the computor. This time he does something that the screen is taken and I find no support in the form of recreation.