Two wireless mouses in an office

urs n,

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Make sure that the two wireless mice are not conflicting with each other.  Ensure that the frequency is different for each radio-controlled mouse.  If you need help with this, the manufacturer of the wireless devices should be able to shed some light on the issue.

I think Dell is the manufacterer and there is no way do change the frequency?

This could be different for your model but for me I just go into Mouse settings in Control Panel, under the Cordless tab, there's a CONNECT button, after going through that it asks me if I want to set the channel.

I'm not sure if you need to be admin to do this- I'm always logged in as Admin so it never really bothered me.