I am having a similar problem. My wifi connects about every 2 days after being off. I have a Dell Latitude D600 with Pentium M and the dell truemobile 1400 minipc adapter driver keeps disappearing. I reinstall it everyday and then it still does not take. My daughter has a Tobisha and she is always connected. I have triedeverything. The driver is not digitally signed, does that have anything to do with it?
