Thank you for being a valued part of the CNET community. As of December 1, 2020, the forums are in read-only format. In early 2021, CNET Forums will no longer be available. We are grateful for the participation and advice you have provided to one another over the years.

Thanks,

CNET Support

General discussion

Frequent BSOD - bisonc07.sys

Oct 26, 2010 6:43AM PDT

My wife has a lenovo U330 ideapad, about a year old. It runs Windows Vista, 2 GHz, 2 GB RAM. A few months ago it started crashing--BSOD reporting "Page fault in nonpaged area" and referring to bisonc07.sys. I looked up the filename and learned that it's a webcam driver, presumably for the built-in webcam.

I couldn't figure out how to uninstall it (it's not listed in Device Manager) so I disabled the camera with <Fn> - <Esc>. That decreased the crashes significantly, but didn't completely solve the problem and requires repeating during every startup. Next, I tried renaming all bisonc07 files, but that did not help. The BSOD messages are still the same.

How can a file that no longer exists be causing these crashes? Is there a registry entry that I need to remove?

Thanks in advance. I should also mention that I have scanned the computer with Symantec and Malwarebytes and the system is clean.

Discussion is locked

- Collapse -
When it goes that far.
Oct 26, 2010 6:49AM PDT

I look at the lenovo site for driver updates. Many folk try the driver update button but that seems to fail here (and for me never helps.)

Try that first and then call Lenovo to report the bug.
Bob

- Collapse -
No help from Lenovo
Nov 10, 2010 10:32PM PST

I downloaded the updated driver from the Lenovo website, but it refused to install. Lenovo support is of no help because the warranty period has passed.

Is there some way to disable VeriFace? The login screen during startup/resume seems to be the most common crash point if the camera is not disabled with Fn-Esc quickly enough.

- Collapse -
From memory
Nov 11, 2010 12:26AM PST

I uninstall veriface a year ago. I don't remember the exact steps but I think I used the Control Panel to uninstall it. If that wasn't it I know I would ask google "How to remove veriface."
Bob

- Collapse -
Sure enough!
Dec 21, 2010 11:50PM PST

I opened VeriFace and found an option to disable during login. Haven't had a crash since.