I installed Intel Turbo Memory driver update - but it also updated the Intel Matrix Storage Manager & Turbo Memory driver. After the installation there were two entries in Programs and Features - one just for the Turbo Memory driver and one for the Matrix Storage Manager & Turbo Memory.
After this installation, my PGP single sign-on stopped working. I would enter a pass phrase at boot and then credentials again when Windows started. I changed my password to get things synched back up and it still didn't work. [more]
I uninstalled the Turbo Memory driver, after which there is only one related Intel entry in Programs and Features and now it doesn't mention Turbo Memory. Then I rebooted and still had to use the old Windows password in the PGP boot loader and the new one when Windows started up. However, this time, when booting into Windows, it gave me a password error before asking for the correct one (i.e., PGP had passed the old one through this time - I could have saved a password change). After I entered the correct password things worked correct at the next boot.