There is evidently a conflict between PRE Transitions loading and having the HP fingerprint reader software enabled. Transitions either will not complete loading or it shuts down PRE. Adobe's solution is to disable the fingerprint reader. If enough others are having the same problem, perhaps Adobe will find another solution.
I hope that you will notify Adobe of this issue.
I've talked with three different phone support people about it; don't know how else to notify Adobe. The first person had me disable the fingerprint reader but didn't tell me that was what we were doing. By the third time, I knew what the conflict was and hoped there was another solution.