laptop acts strange on one network

[infogaby]

Hi, I have 2 networks, one in my warehouse and 1 home office, it is just 2 laptops, we carry back and forth on a daily basis, at my home office I have no issues it works great.

Both networks are wireless.

at my warehouse, my laptop is acting strange, when I single click it does a double click, when I try to highlight something it takes forever to higlight it to copy it and so on.
the other laptop works fine,

Laptop with problems is Sony Vaio - windows 7

Warehouse we have AT&T DSL

Home Office we have Internet thru cable

Any ideas what can cause the one laptop to act up and how to prevent it?

thanks for any help