Help i dont what to do

my wife computer keeps giving me a blue screen every time i try to update windows
the computer is a Packard bell easy note tm01 with oem windows 7 home premium 64 bit.

I note you have AVG.

AVG can be a contributing cause of BSOD'S .
Please remove and replace with Microsoft Security Essentials AT LEAST TO TEST

Download tools and utilities | AVG Worldwide


Microsoft Security Essentials - Free Antivirus for Windows

In addition to JMH's suggestion please run the SURT, update to SP-1 and update these drivers.

Code:

SCDEmu.SYS    8/7/2007 11:19:48 AM        fffff880`02c72000    fffff880`02c84000    0x00012000    0x46b88d94                        
NTIDrvr.sys    3/24/2009 11:09:39 PM        fffff880`0751f000    fffff880`07527000    0x00008000    0x49c9a073                        
UBHelper.sys    4/27/2009 4:48:19 AM        fffff880`07517000    fffff880`0751f000    0x00008000    0x49f57153

How To Find Drivers:

- search Google for the name of the driver
- compare the Google results with what's installed on your system to figure out which device/program it belongs to
- visit the web site of the manufacturer of the hardware/program to get the latest drivers (DON'T use Windows Update or the Update driver function of Device Manager).
- if there are difficulties in locating them, post back with questions and someone will try and help you locate the appropriate program.

- - The most common drivers are listed on this page: Driver Reference Driver Reference
Driver Reference Table (DRT)