The driver can be the most updated version and still be corrupted. Most times just installing a new copy will fix things - but sometimes you'll have to uninstall the old one before installing the new one in order to get at the one thing that's causing the problem.
Here's a link to your other post: http://www.bleepingcomputer.com/forums/t/162251/blue-screen-with-this-error-driver-irql-not-less-or-equal/
Since the easy fix didn't work, we'll have to go at this the hard way
Here's a link to a brief description of the error message: http://aumha.org/a/stop.php#0xd1
The first step is to check for malware - but you've stated that you've already done that in your previous posts.
Next, use the Windows Memory Diagnostic to test your system's memory: http://www.bleepingcomputer.com/tutorials/using-vista-windows-memory-diagnostics-tool/
Then, reset your system's pagefile by doing this:
a ) Go to Start...Run...and type in "sysdm.cpl" (without the quotes) and press Enter.
-Then click on the Advanced tab,
-then on the Performance Settings Button,
-then on the next Advanced tab,
-then on the Virtual Memory Change button.
b ) In this window, note down the current settings for your pagefile (so you can restore them later on).
-Then click on the "No paging file" radio button, and
- then on the "Set" button. Be sure, if you have multiple hard drives, that you ensure that the paging file is set to 0 on all of them.
-Click OK to exit the dialogs.
c ) Reboot (this will remove the pagefile from your system)
d ) Then go back in following the directions in step a ) and re-enter the settings that you wrote down in step b ). Follow the steps all the way through (and including) the reboot.
e ) Once you've rebooted this second time, go back in and check to make sure that the settings are as they're supposed to be.
Next will be to enable the Driver Verifier tool and let it run until you get another crash. Then you'll perform an analysis of the crash dump file (as you did in the other topic) and post it here for us to have a look at.
To do that, go to Start and type in "verifier.exe" (without the quotes) and press Enter
In the window that pops up, click on Next (this creates the standard settings)
In the next window, click on Next (this will select the unsigned drivers)
In the next window, click on Finish.
Then, reboot your computer.
- If it crashes immediately, this is a good thing - and the dump file analysis will likely reveal the name of the offending driver.
- If it doesn't crash immediately, keep it running until it does crash. This crash can provide further clues to the reason for the problem.
Once you save the crash dump analysis, then go back into Driver Verifier and select the "delete existing settings" button and complete the dialog. This will turn off Driver Verifier. The reason for this is that Driver Verifier will slow down your system some, and deleting those settings will let it return to normal performance.
Once you've done that