I am running PD6 and Windows 7. I use a SafeNet Sentinel USB security key for my company's billing program. Everything worked great under PD6. I upgraded to PD7 so I could do the Mountain Lion installation but every time I try to use my SafeNet Sentinel USB key and open our billing program, I get a "driver initialization error". If I revert back to PD6, everything works great. I tried un-installing & re-installing the driver with no luck. Parallels support just told me to re-install the driver (which I already tried... several times). Very frustrating! Any thoughts or ideas?