Is it possible to make my laptop's screen be a second monitor for my desk computer?
I tried Synergy and could not configure it. It is a geek hell of switches and parameters.
Then I tried Zonescreen. It refused to install because it requires to install the Windows XP old video drivers on Win7 which I do not want to.
Then I tried Maxivista and ...WOOAH! Amazing thing! Worked out of the box and I never expected this performance of transmitting the desktop so fast on the LAN.
You can also do it via remote assistance, if you have a second output on your display adapter. I mean that you have to be able to hook another display to your desktop PC via cable. The remote assistant is able to show the secondary desktop (as well as the primary) even if the monitor is not physically hooked.
No third party programs required for this solution.
Edit: In details, if you have a multiple outputs in your display driver but no monitors (not hooked), you can do the following (works for nvidea quadro 2000 and win 7):
This trick does not require admin rights nor extra software.