BSOD during Quickheal Scan error code D1

[Plashrz]

Need some serious help...
I have dell vostro
Windows 7 32 bit
And i keep encountering BSOD... windows repair didn't work and recovery/image not available ..
Current status BSOD on login screen can't go forward that
I have deleted quick heal as it was the last thing that i was operating before it happened..
Someone help fast

I've got the minidump file attached.

 

[yowanvista]

Your OS is out of date, Service Pack 1 and over 4 years of critical updates are missing from your system. You should install all available updates asap.

The dump file points to athr.sys (Qualcomm/Atheros Extensible Wireless LAN driver) which is also out of date. You can find updated versions here.

BugCheck D1, {4, 2, 0, 8c8d9b02}

Unable to load image \SystemRoot\system32\DRIVERS\athr.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for athr.sys
*** ERROR: Module load completed but symbols could not be loaded for athr.sys
Probably caused by : athr.sys ( athr+3a5c1 )