When I click System - Remote, only Remote Assistance appears. I don't see Remote desktop (as you can see in the attachment).
Please give me an explanation.

I have Windows Vista and in System Properties -Remote, Remote Desktop is missing (see the image I 've attached before), so I can't turn it on.
I've found Remote Desktop in Accessories...but it can't be turned on from there.

If you have the Home Edition, it does not have that option.

Important note: Remote desktop is only included in the Professional, Business, or Ultimate versions of Windows. Home editions do not have remote desktop.

I have Home Premium edition, indeed. Then why Remote Desktop can still be found in Accessories? .......