I'm having problems with my alarm going off with no apparent reason,it happens every few weeks, and occasionally the windows are all half open when I return to the car.

Any ideas?

Water could have got in somewhere it shouldn't.

A few people have complained about the windows lowering without pressing and holding the unlock button on the key fob.

The fact the alarm is randomly going off too has to be related.

You really need to get the car scanned for fault codes to give you a better idea of what is wrong.

The have been quite a few weird and wonderful electrical issues that have eventually been traced back to a failing battery...