The problem file is not aswRvrt.sys as that is the last driver to load successfully
Please print these instruction out so that you know what you are doing
[*]Download OTLPENet.exe to your desktop
[*]Ensure that you have a blank CD in the drive
[*]Double click OTLPENet.exe and this will then open imgburn to burn the file to CD
[*]Reboot your system using the boot CD you just created.
Note : If you do not know how to set your computer to boot from CD follow the steps here
[*]As the CD needs to detect your hardware and load the operating system, I would recommend a nice cup of tea whilst it loads 
[*]Your system should now display a Reatogo desktop.
Note : as you are running from CD it is not exactly speedy
[*]Double-click on the OTLPE icon.
[*]Select the Windows folder of the infected drive if it asks for a location
[*]When asked “Do you wish to load the remote registry”, select Yes
[*]When asked “Do you wish to load remote user profile(s) for scanning”, select Yes
[*]Ensure the box “Automatically Load All Remaining Users” is checked and press OK
[*]OTL should now start.
[*]Drag and drop this attached scan.txt into the Custom scans and fixes box
[*]Press Run Scan to start the scan.
[*]When finished, the file will be saved in drive C:\OTL.txt
[*]Copy this file to your USB drive if you do not have internet connection on this system.
[*]Right click the file and select send to : select the USB drive.
[*]Confirm that it has copied to the USB drive by selecting it
[*]You can backup any files that you wish from this OS
[*]Please post the contents of the C:\OTL.txt file in your reply.