Nice way to be clear about security
Just upgraded two PCs. a Sony Vaio VPCZ2290X legacy PC (with TPM) and a HP Envy2. *BOTH* were configured to use BitLocker Drive Encryption. Both were configured to ask for a PIN at boot. Guess what? Windows 8.1 upgrade not only booted the machine lots of times but it didn´t ask for the PIN, not only once.
I don´t know if I should worry. Guess that I should, only if I have something private stored on those (and I mean... something I don´t want Microsoft or any government to get their hands on).
Once the upgrade completed, it started asking for the PIN again. Please correct me if I am wrong (I want to be!!) but that means only two possible things:
1. Windows stores my PIN or
2. Windows has a key to secretly access bitlocker drives directly
I don´t know what is worse.
To be honest, if I had any doubt about the complete lack of security, privacy etc on the platform, this simple thing just washed it clean.