Sony really seems to suck at Blu-ray on PCs, which is the weirdest thing, as they own most of the Blu-ray license rights and they have the PS3.
I read from your other posts that the Sony helpdesk did not ... help, which might be understandable since this laptop ships with Vista, but it is also certain that Sony tested this Windows 7 upgrade scenario and have the answer somewhere. And they had 2
years to test it since the first Windows 7 Betas.
Several people in that other thread mentioned display drivers as the culprit, you should try that again. Make sure first that you have the latest BIOS, BD/DVD firmware and display drivers directly from the video chipset and BD drive manufacturers' web sites,
with no possibly interfering software like AnyDVD, iTunes, or antivirus. If that does not work, check if you can find a previous version of the display driver and try with older drivers, maybe one will work.
Roxio sucks too, but really, it's your fault for not backing up your stuff on an external hard drive or better yet, a remote site. Microsoft offers 25 GB for free on SkyDrive if you have a free live account, all Asus laptops also come with free online storage,
although much smaller than SkyDrive.