BSOD IRQL_NOT_LESS_OR_EQUAL and random freezes

Nisym said:

All was going so well, unfortunately, first BSOD sans battery! Though this time, it gives a different error message System Service Exception. It happened as I was watching a youtube video.

Unfortunately there is no such BSOD crash dump in the uploaded zip, so we cannot comment on it.

Though a stop 0x3B System Service Exception is very common in nature, and memory corruption is a very frequent cause of this one, better you test your RAM modules for possible errors.
How to Test and Diagnose RAM Issues with Memtest86+
Run memtest for at least 8 passes, preferably overnight.

If it start showing errors/red lines, stop testing. A single error is enough to determine that something is going bad there.

Let us know the result.

If you ran it for at least 8 consecutive passes and it reported no errors, no need to run it again.

But if it was less than 8 passes, you need to run it again.

If memtest86+ is free from errors, better you enable Driver Verifier to monitor the drivers, because any driver passing bad info to memory is another common cause of a System Service Exception BSOD.
Driver Verifier - Enable and Disable
Run Driver Verifier for 24 hours or the occurrence of the next crash, whichever is earlier.

   Information

Why Driver Verifier:
It puts a stress on the drivers, ans so it makes the unstable drivers crash. Hopefully the driver that crashes is recorded in the memory dump.

How Can we know that DV is enabled:
It will make the system bit of slow, laggy.

   Warning

Before enabling DV, make it sure that you have earlier System restore points made in your computer. You can check it easily by using CCleaner looking at Tools > System Restore.

If there is no points, make a System Restore Point manually before enabling DV.

   Tip

• If you fail to get on the Desktop because of DV, Boot into Advanced Boot Options > Safe mode. Disable DV there. Now boot normally again, and try following the instruction of enabling DV again.
• If you cannot boot in Safe mode too, do a System Restore to a point you made earlier.

Let us know the results, with the subsequent crash dumps, if any.

Code:

kd> lmvm mcdbus
start             end                 module name
fffff880`06cd0000 fffff880`06d0c880   mcdbus   T (no symbols)           
    Loaded symbol image file: mcdbus.sys
    Image path: \SystemRoot\system32\DRIVERS\mcdbus.sys
    Image name: mcdbus.sys
    Timestamp:        Tue Feb 24 04:34:07 2009 (49A3CD1F)
    CheckSum:         00041E84
    ImageSize:        0003C880
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

That is the driver for magic ISO which, as you can see is quite old. Try to find an updated driver for your product at
http://www.magiciso.com/

essenbe said:

...
That is the driver for magic ISO which, as you can see is quite old. Try to find an updated driver for your product at
http://www.magiciso.com/

Good catch essenbe;

I've seen BSODs related to virtual CD drives such as Deamon tools, but I don't know much about MagicISO.

When I followed your link (thanks) I read a bit and it is my opinion that there's probably a better / newer product out there that could replace MagicISO on Nisym's machine. The supported OSes and the copyright are indications that the software is not really suitable for Win7. It might work, but it might cause issues.

Attachment 322451

Nisym, if you aren't opposed to this, I suggest that instead of updating MagicISO that you uninstall it.
Since ISO is a std, any files MagicISO created should be std as well and any ISO capable pgm should be able to mange them.

I know there are a few ISO readers, creators that members use around here, I just can't recall off the top of my head what they are.

I'll look while you think about the suggestion.

Bill
.

Found a virtual CD drive Control Panel from Microsoft.
Download Virtual CD-ROM Control Panel from Official Microsoft Download Center

I might try this (note that I have not yet - it is fairly recent though)

edit: maybe not - from the details expansion

This tool is not supported by Microsoft; use at your own risk

That is a possible ISO mount replacement. Let me ask this before I post more options.
How do you use MagicISO? Reading ISO files, Mounting ISO files, writing ISO files to Optical disc? Creating ISO files?

Knowing your needs would help determine a good replacement if you decide that is what you want to do.

Bill
.

Thanks, I think you made a good decision to uninstall MagicISO

7-zip is a very good application, it can read and write many compressed formats, including ISO files. so it's not a one trick pony.

You can not mount an ISO, but you can read and extract the contents. You can always use the native Windows burner to write a CD. I use applications, such as 7-zip to do occasional tasks on 'special' file types. Why have a Virtual CD driver running all the time - that's how I look at it.

Here's an extensive list of free software compiled on SevenForums:
FREE Great Programs for Windows 7 [2]

That doesn't mean an endorsement of the software, buy it does mean that it has been somewhat vetted.

After you get the BSOD issue resolved, it might be worth while to review your software inventory. Some might be unused, some might be old, and some might not play well with others.... but that's for another thread.