I turn on my computer and although the mouse and the keyboard are connected they won't work. I am sure the mouse and the keyboard are fine. There is something wrong with the desktop.

you can try it changing the USB connector if it is USB mouse,

You should be a little bit more specific. But since you were not, I will try to be more specific about this.

First thing to know is that connecting keyboard and mouse to the computer will always work, no matter what. Meaning that once you connect either one, they will always work. Here are some things to try:

1. Check to make sure that the connector used for the computer is fine, its not broken or bent in the connecter. Check both the computer slot and the connector itself.

2. Make sure that the batteries are new if its wireless.

3. If mouse and keyboard use a separate connectors, and you know that mouse works. Try unplugging the mouse and connecting the keyboard in the same slot.

4. Try a different USB slot in the computer

5. Try a different keyboard all together

6. Make sure there are no off switches on the keyboard that might be in the off position.

I hope this helps.

try replacing the key board battery or make sure that it is the correct way

You should check the connection of you mouse and keyboard to see if they are properly connected.If the connections are okay you should go to the manufacturer website and download and install the drivers for the mouse and keyboard,i cannot give you the link because i am not sure what type of mouse and keyboard you are using. If you are using wireless mouse and keyboard you should replace the battery inside both of them and make sure the receiver is turn on.After you try these solution your mouse and keyboard should work fine.

Try to re-connect the mouse and keyboard using the connect buttons on the keyboard/mouse and the receiver to the computer.

I opened up the Logitech Mouse and Keyboard Settings, turned my keyboard off, changed out the batteries and turned it back on. It then detected the Keyboard and asked for a password, I entered in the password, it said it was rebooting it and asked for another password which I entered (both passwords were given to me in the Settings). Now it is working just fine! Not sure if you have tried this but it might work for you.

Solution for the mouse. I have 8 KVM's. Most of my computers work with the KVMs. On 1 inland KVM the logitect and Microsoft optical mice do not work on one computer (but work with the other computers). They both are USB. I hook them up with a USB to PS2 adapter. If I use a ps2 ball mouse connected to the KVM the mouse works. All the Mice work if I directly connect them. Since I do not want a ball mouse I got a Frisby optical PS2 mouse. It works with all the computers on the KVM's.

I do not have a solution for the Keyboard yet. 1 computer (ASUS MB) on my trendnet or belkin 4 postion KVM does not recognize the keyboard.

Make sure batteries are good in both the Keyboard and Mouse. Then press the button on the Receiver.
Normal 0 Press the Receiver button (and the lights will start flashing.
Then if the Keyboard isn't working, press the small RESET/CONNECT button on the back of the board to connect the keyboard to the receiver.

If the MOUSE isn’t working, push the small RESET/CONNECT button on the back of the mouse to connect to the receiver. Then they should work okay.
Hope this helps. Bud

Make sure the mouse batteries are good. then,
Normal 0 Turn the mouse over and find the smallrest/connect button on the bottom of the mouse and press it toReset/Connect the mouse to the receiver and work properly.
If not, try pressing the receiver button and then pressthe mouse. This should be done whenever you change batteries orglitch.
Hope this helps you. Bud

Have you pressed the connect button on the bottom (or side) of the keyboard. Having the mouse working means that all the rest of the kit is working, (as the reciever can connect to the mouse) if the keyboard will not connect (after pressing connect a few times)it seems that you have a dud transmitter in the keyboard, This does happen unfortunately (the oscilator crystal fails) if within warrantee try to get it replaced. Hope this helps