Ok, I found the solution.
If anyone else is having the same issue, just run regedit, find this:
Then, find Display1_RotationCaps, and set the value to 7.
Rotation will be now available through the Screen Resolution menu by right clicking on the desktop.
Let's hear a big clap for the geniuses at HP (or whatever) that "hid" the very basic screen rotation feature in regedit for common users to accidentally f**k up their systems by trying to enable it.
Well done. We are very proud of you.
Keep it up wasting our time in such a magnificent manner.
Hi Thanks for the information, This was helpful, But still i have problem.
1. I could see the rotation option in the screen resolution but i could not change from landscape to portrait or vice versa and apply it, while change and applying its throws error, "this could not be saved try some other option". even if i change to any other option it says the same error.
2. I have two display. the rotation option appears only for the main display not for the extended display. What is the way to get that.
pls hlp me