aswRvrt.sys Sony Vaio Windows 7 Help

[REDACTED]

I realize that this is a common problem and that you guys keep saying that it's not Avast's fault, but this is the second time that Avast has updated and wreaked havoc on my entire system.

About four days ago now, Avast updated automatically (without knowledge or permission) before eventually restarting and receiving the BSoD related to aswRvrt (or whatever driver comes after it according to you guys). I've done the normal steps of course of trying to repair my system with the limited options I have. Unfortunately, with this model having such a restrictive BIOS menu (which normally doesn't matter but here it does), I can't boot a Linux LiveCD to troubleshoot Avast and backup any other files that are important. I've tried to check out Avast in the registry using regedit but searches for "avast" "asw" "alwil" etc. don't even bring up Avast. So I haven't been able to manually take out registry keys. As with all related BSoD issues that I've seen I can't of course access my desktop or safe mode and the driver authorization for unofficial drivers doesn't boot the system either.

Maybe I've overlooked something or another extremely simple but any and all help would be greatly appreciated.

Thanks in advance.

[REDACTED]

edited to be included in my first message. Sorry for double post.

[essexboy]

Is this a 32 or 64 bit system

[essexboy]

Download the following three programmes to your desktop :
I will |PM the ISO links
 
 
1.  Rufus 
 
For 64bit systems  
2. Windows 7 64bit RC
3. Farbar Recovery Scan Tool x64 
 
For 32bit systems
2.  Windows 7 RC
3. Farbar Recovery Scan Tool  
 
 
Insert the USB stick Then run Rufus
 

Select the ISO file on the desktop via the ISO icon. 
 
Press Start Burn

Then copy FRST to the same USB   
 
   
 
 
 
Insert the USB into the sick computer and start the computer.  First ensuring that the system is set to boot from USB 
Note: If you are not sure how to do that follow the instructions Here
 
Windows 7 and Vista screenshots 

When you reboot you will  see this.
 Click repair my computer  
 
 
Select your operating system  
 
 
Select Command prompt 
 
 
At the command prompt type the following  :
 
notepad and press Enter. 
The notepad opens. Under File menu select Open. 
Select "Computer" and find your flash drive letter and close the notepad. 
In the command window type e:\frst64.exe  or  e:\frst.exe dependant on system
 and press Enter 
Note: Replace letter e with the drive letter of your flash drive. 
The tool will start to run. 
When the tool opens click Yes to disclaimer. 

Press Scan button. 
It will make a log (FRST.txt) on the flash drive. Please copy and paste it to your reply.