Code:
4: kd> .bugcheck
Bugcheck code 0000001A
Arguments 00000000`00000403 fffff680`001de3e8 d6f00001`a1af886f fffffe80`001de3e8
0x403 first argument, implies that the page table and PFNs are out of sync.
Code:
4: kd> .formats d6f00001a1af886f; .formats fffffe80001de3e8
Evaluate expression:
Hex: d6f00001`a1af886f
Decimal: -2958864948174813073
Octal: 1533600000064153704157
Binary: 11010110 11110000 00000000 00000001 10100001 10101111 10001000 01101111
Chars: .......o
Time: ***** Invalid FILETIME
Float: low -1.18946e-018 high -1.31941e+014
Double: -6.01228e+110
Evaluate expression:
Hex: fffffe80`001de3e8
Decimal: -1649265482776
Octal: 1777777750000007361750
Binary: 11111111 11111111 11111110 10000000 00000000 00011101 11100011 11101000
Chars: ........
Time: ***** Invalid FILETIME
Float: low 2.74499e-039 high -1.#QNAN
Double: -1.#QNAN
The parameters are very different and don't seem to note any single bit corruption, so this is possibly a driver. Good call on not blaming memory straight away. Let's enable verifier.
Driver Verifier:
What is Driver Verifier?
Driver Verifier monitors Windows kernel-mode drivers, graphics drivers, and even 3rd party drivers to detect illegal function calls or actions that might corrupt the system. Driver Verifier can subject the Windows drivers to a variety of stresses and tests to find improper behavior.
Essentially, if there's a 3rd party driver believed to be causing the issues at hand, enabling Driver Verifier will help us see which specific driver is causing the problem.
Before enabling Driver Verifier, it is recommended to create a System Restore Point:
Vista - START | type rstrui - create a restore point
Windows 7 - START | type create | select "Create a Restore Point"
Windows 8/8.1 -
Restore Point - Create in Windows 8
How to enable Driver Verifier:
Start > type "verifier" without the quotes > Select the following options -
1. Select - "Create custom settings (for code developers)"
2. Select - "Select individual settings from a full list"
3. Check the following boxes -
- Special Pool
- Pool Tracking
- Force IRQL Checking
- Deadlock Detection
- Security Checks (only on Windows 7 & 8/8.1)
- DDI compliance checking (only on Windows 8/8.1)
- Miscellaneous Checks
4. Select - "Select driver names from a list"
5. Click on the "Provider" tab. This will sort all of the drivers by the provider.
6. Check EVERY box that is
NOT provided by Microsoft / Microsoft Corporation.
7. Click on Finish.
8. Restart.
Important information regarding Driver Verifier:
- Perhaps the most important which I will now clarify as this has been misunderstood often, enabling Driver Verifier by itself is
not! a solution, but instead a diagnostic utility. It will tell us if a driver is causing your issues, but again it will not outright solve your issues.
- If Driver Verifier finds a violation, the system will BSOD. To expand on this a bit more for the interested, specifically what Driver Verifier actually does is it looks for any driver making illegal function calls, causing memory leaks, etc. When and/if this happens, system corruption occurs if allowed to continue. When Driver Verifier is enabled per my instructions above, it is monitoring
all 3rd party drivers (as we have it set that way) and when it catches a driver attempting to do this, it will quickly flag that driver as being a troublemaker, and bring down the system safely before any corruption can occur.
- After enabling Driver Verifier and restarting the system, depending on the culprit, if for example the driver is on start-up, you may not be able to get back into normal Windows because Driver Verifier will detect it in violation almost straight away, and as stated above, that will cause / force a BSOD.
If this happens, do not panic, do the following:
- Boot into Safe Mode by repeatedly tapping the F8 key during boot-up.
- Once in Safe Mode - Start > Search > type "cmd" without the quotes.
- To turn off Driver Verifier, type in cmd "verifier /reset" without the quotes.
- Restart and boot into normal Windows.
If your OS became corrupt or you cannot boot into Windows after disabling verifier via Safe Mode:
- Boot into Safe Mode by repeatedly tapping the F8 key during boot-up.
- Once in Safe Mode - Start > type "system restore" without the quotes.
- Choose the restore point you created earlier.
-- Note that Safe Mode for Windows 8/8.1 is a bit different, and you may need to try different methods:
5 Ways to Boot into Safe Mode in Windows 8 & Windows 8.1
How long should I keep Driver Verifier enabled for?
I recommend keeping it enabled for at least 24 hours. If you don't BSOD by then, disable Driver Verifier. I will usually say whether or not I'd like for you to keep it enabled any longer.
My system BSOD'd with Driver Verifier enabled, where can I find the crash dumps?
- If you have the system set to generate Small Memory Dumps, they will be located in
%systemroot%\Minidump.
- If you have the system set to generate Kernel Memory Dumps,
it will be located in
%systemroot% and labeled MEMORY.DMP.
Any other questions can most likely be answered by this article:
http://support.microsoft.com/kb/244617