Boxster Windows Roll Down Over Bumps

[bmyslis]

I have a 1997 Boxster with 21,000 miles on her. Every time i go over a fairly large bump in road, both windows roll down about 20% of full roll down. I know it's related to the top lock down lever. How do I fix. Any ideas would be appreciated. Thanks.
Bruce

[78F350]

There is a micro-switch inside the place where the top latch hooks into the center of the windshield frame. Poor contact with that switch can cause the windows to drop, as if the top was about to be lowered.

Check these out:
Top Latch Micro Switch
https://www.renntech.org/forums/topic/10458-windshield-microswitch/