The switch works well in principle but if we share screen, keyboard and mouse between a PC and a Windows XP PC Windows 7, curiously when we return from the windows XP on the one loses and Windows7 degrades original graphic definition screen forcing us to reconfigure the switch after each good definition .... this is due to an incompatibility with the switch windows 7 ...? I have not found the answer to this question on the website of TrendNet .... unfortunately.