Fortunately this item was quaranteed through AMAZON and I was able to get a full refund. The refund was not fast but was given eventually. Completely dissatisfied with product. Notably I have been the primary computer technical support for a local healthcare facility for the past 5 years. I would not recommend this product to anyone.

I hooked this switch up to a Dell Dimension 2400 P4 and an old Gateway P3. I'm dual booting on both boxes between XP Pro & Server 2003 R2. I'm also using a usb mouse with the usb/ps2 adapter plugged into the switch. I've been using it for several months and it's been working fine. About once every 2 or 3 weeks, the Dell will boot up with the screen zoomed about twice the normal size, but a simple restart resolves it. I've had no problems at all with the Gateway. There's a 1-2 second lag between switching from one PC to the other, but that seems standard. I would have preferred it to be wall mountable, but it sits on top of the PC and the cables don't take up too much space. This switch works fine and I recommend it to anyone who needs a KVM switch.

I bought this piece about a year ago and I am now searching for a new one. If computer A is on and i switch to B, all is fine, switching back to A is where the trouble lies. B is always a good connection however. I have swapped PC's to make sure it's not a pc problem. The trouble stays with the connection, not the PC.

I hoped to use the DKVM as just a monitor switch because only one PC has ps/2 keyboard and mouse (our newer PC uses USB inputs). My assumption was that if I kept the (USB input KB & M) devices connected directly to the new PC, Windows would detect that all devices were connected, and all would be happy. The instructions do not mention anything about such a connection scheme --they only assume you have just one KB and Mouse (ps/2 type) and run them into the DKVM to switch between both PCs. There are not even any FAQs to address other possible cases.

First try, I left all KBs and mice hooked directly to the PCs, and ran just the monitor cables thru the DKVM. The monitor screen showed nothing but black with either or both PCs booted.

Email tech support at D-link was reasonably responsive (but tried to channel me to phone support instead, after I'd typed all the particulars in the email interface). First reply said it should work even with just one PC, preferably using the "PC1" side. So next I tried connecting the Ps/2 inputs to the DKVM and thru it to the old PC as "PC1." (The USB devices remained direct to the new PC2.) That put the screen display for PC1 on the monitor, cleanly. But when I tried switching to PC2, monitor would show the PC2 screen for just a split second [very fast blink], then it would revert back to the PC1 image.

Tech support said the DKVM gets its power from the mouse port; that means that even if it would have switched to PC2 display [no go], I would still need to have the old PC1 running also just to power the DKVM. That's not what I had in mind at all; so the DKVM is no real use in my situation.
Conclusion: skip the DKVM unless you have ps/2 connections on both PCs.

I was very happy with the quick delivery of this unit. I was tired of unplugging and replugging the keyboard and mouse and monitor between two computers. Ain't electronics just amazing!!!