When schedule the test list IsAlive (project attached in internal description) for 24 hours running at 15 min intervals a lot of IE instances about blank are left over.

Steps to reproduce:

1. Schedule the attached project for 24 hours or overnight run at 15 min intervals. It is important that you get it running at those 15min intervals as otherwise you wont see any issues most likely.

Expected behavior: No IE instances are left opened
Actucal behavior: A lot of IE instances are left over in about blank state