I have a set of new Dell Latitude E5500 laptops. They all run Windows 7 business. A couple of them have been displaying some weird behavoiur. One in particular is very bad. When it is in the teachers classroom, the touchpad is so dysfunctional that she has to use a USB mouse. As soon as she takes that machine to a different room in the school the touchpad works perfectly! When she takes it back into her room - problems again. Dell have replaced the touchpad and palmrest, the motherboard and the hdd, all to no avail. Two other machines occasionally display similar behaviour. Any ideas?
