computer screen reversed upside down How correct?

For windows xp:

I have faced the same problem and just follow these steps:

1.Right click and go to 'properties'.

2.You will have an option called 'Settings'.

3.Choose the option called 'Adavnced'.

4.A new window will be opened and you will have an option called 'Intel Graphics Adapter'.

5.In that you will have an option called 'Rotation'.

6.select that and choose it to 'Zero degree' and click 'apply'.

7.System will restart and then again follow steps number 1,2,3,4,5 and you will find an option called 'never rotate'.

8.Select that one and click on apply.

9.That's your problem is fixed.