Thanks for uploading the dump file. According to the log you have Kaspersky anti-virus installed on your computer and a driver for the same is causing the BSOD. Note that is could be malware causing the Kaspersky driver to crash.
On Fri 10/26/2012 9:17:39 AM GMT your computer crashed
crash dump file: C:\Windows\Minidump\Mini102612-02.dmp
This was probably caused by the following module: klif.sys (klif+0x3B4F7)
Bugcheck code: 0x10000050 (0xFFFFFFFFF000EF5D, 0x1, 0xFFFFFFFFBF80170D, 0x2)
Error: CUSTOM_ERROR
file path: C:\Windows\system32\drivers\klif.sys
product: Kaspersky™ Anti-Virus ®
company: Kaspersky Lab
description: Klif Mini-Filter [fre_wlh_AMD64]
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: klif.sys (Klif Mini-Filter [fre_wlh_AMD64], Kaspersky Lab).
Google query: Kaspersky Lab CUSTOM_ERROR
Reboot the computer in safe mode and uninstall Kaspersky. Once Kaspersky has been uninstalled reboot in normal mode.