For a while now, randomly my Pro will ask for a password when I press the center button to remove the key guard. Happens once or twice a week. Usually I notice it first thing in the morning when I check my phone. Just yesterday though it was durring the day.

I have never used a password. The only way I can unlock the phone is to soft restet it then it will be fine for a few more days.

I thought it might be Microsoft .net CF 3.5 but I have removed it and still have the problem.

Any thoughts would be apprecited!