I've experienced some BSOD on windows 7 RC, and some freezing when startup, but today was big surprise, it doesn't start anymore.

I tried to start on safe mode and no results too, it shows the starting animation, then a blue screen for less than a second and turns off immediately.

The only thing I remember did today is update flash player under Firefox, then chrome stopped working even after logging off, and once restarting, it doesn't start anymore.

Anyone experienced the same issue? any hints?

[EDIT 3] Solved : Windows 7 have a very smart repair strategy, it works automatically, and it tried every possible fix, what fixed my problem was the system restore to a previous date, all this happened automatically.

[EDIT2] these are the last lines in the ntbtlog.txt file

Did not load driver
\SystemRoot\System32\drivers\vga.sys
Loaded driver
\SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver
\SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver
\SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver
\SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver
\SystemRoot\System32\Drivers\NDProxy.SYS
Loaded driver
\SystemRoot\system32\drivers\CHDRT32.sys
Loaded driver
\SystemRoot\system32\DRIVERS\VSTAZL3.SYS
Loaded driver
\SystemRoot\system32\DRIVERS\VSTDPV3.SYS
Loaded driver
\SystemRoot\system32\DRIVERS\VSTCNXT3.SYS
Loaded driver
\SystemRoot\system32\drivers\modem.sys
Loaded driver
\SystemRoot\system32\DRIVERS\usbccgp.sys
Loaded driver
\SystemRoot\System32\Drivers\usbvideo.sys

[edit] this is the BSOD I get : http://twitpic.com/i87cx

Thank you.