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Can I use my laptop as a second monitor for my desk computer?

I want to try and use a monitor as a second monitor without paying for any software. Is this possible?

Someone told me me it is apparently possible using a double male usb cable. Is he correct?

I am running windows 7 on both laptops.

marked as duplicate by Tamara Wijsman, studiohack, Mehper C. Palavuzlar, Troggy Jan 31 '11 at 20:08

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win2vnc + vnc is cleaner and less buggy... Just google win2vnc. Full instructions should be easy to find

  • why the downvote, people? – studiohack Aug 29 '10 at 19:34

If you have them both connected to the same network, then you are in luck. There is a little program called Synergy that will do this for you. Requires a little configuration, but there is one gotcha to look out for.

When you set it up and say that, for example, the laptop is to the right of the desktop... make sure to also tell it that the desktop is to the left of the laptop. Otherwise, your mouse can go from the desktop to the laptop and can't get back!

  • 4
    Synergy is a great tool, but just to clarify: it won't make your other computer a second display, it'll just let you move the mouse back and forth between the two displays, and you only need 1 keyboard. You're still using 2 computers at once. – nhinkle Aug 29 '10 at 19:06
  • +1 for interesting solution, but it wasn't exactly what OP asked for – hotei Aug 29 '10 at 19:24
  • That may be true, but that does give you an interesting tradeoff. You lose the ability to move windows from one monitor to the other, and in return you can have the laptop grinding away at something, and mouse back to the desktop and use it with no problems. – Ryan Gooler Aug 29 '10 at 19:35

From this blog post, you can use MaxiVista for this purpose. If you don't mind dropping the $40, that is.


Check out this webpage from Alternativeto.com...it lists the (mostly) free alternatives to Maxivista...as good of a list as you're gonna get...


Also, check out QSynergy (better GUI) and Synergy+ (Although, now Synergy and Synergy+ have merged...

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