screen sideways

My monitor works fine, I have tested it, but when my computer comes up to the desktop it flips to its side. I have run viruses on it and there where none. I have check all settings. It was working fine, we had the power go out three times right in a row, not sure if this is what did it in. But didn't work correctly after that. Any help or suggestions would greatly be appreciated. Thanks in advance.

 

Go to Control Panel>Display>Settings tab>Advanced button.

Look for a way to change the rotation setting.

 

Most likely was activated in your display driver. Most modern drivers can flip and rotate the screen. (This was in part meant for rotateable LCDs). Go the advanced settings in your display contol applet. On mine, nvidia, i go Control Panel>Display>Settings tab>Advanced button>Geforce4 MX 440, and then a side bar pops out. From there i go to rotation.

 

Pardon, thats NVRotate