BSOD caused by ntosknl


Excellent Member
Microsoft Community Contributor
Ok, I will attempt...

An expected clock interrupt was not received on a secondary processor in an
MP system within the allocated interval. This indicates that the specified
processor is hung and not processing interrupts.
This is what shows up in the dump file. It seems to have caught QQ.exe which might be some type of software from Tencent. If you know what this is, you might check for an update, if not, can you remove it. It might be something like Symantec catching or interrupting something, but updates would not hurt.

Edit: Your first dump file caught ccsvchst.exe which seems to be part of Norton. Perhaps this link to Norton will help.

Last edited:
Thank you for replying!
So if i use norton removal tool to remove norton will it help?
And is this a hardware issue?


Excellent Member
Microsoft Community Contributor
It does not appear to be hardware...but the dump files do not point to anything specifically (except the delayed clock), so hard to tell for sure.


Extraordinary Member
It could possibly be.

Usual causes are: Device driver, BIOS bug, hardware defect.

Seeing as device drivers are the easiest, and cheapest (free), best to go for that option first. But Saltgrass is right, Norton does not have a very good reputation. Even with Seven. Replace Norton with BSOD friendly Microsoft Security Essentials as its replacement. Make sure Windows firewall is enabled!

Thank you for the replies guys,

I used Norton removal tool to remove it and my friend is helping me to format my computer later the day, do you guys think it will help?


Honorable Member
Microsoft MVP
View attachment 16351 View attachment 16352

My laptop is
Lenovo Z575
Processor is AMD A6-3400M APU with Radeon (tm) HD Graphics 1.40 GHz
RAM: 6.00 GB
Window 7 64 Bit

Anyone ? pls help

Just a note in passing. Norton often causes these kinds of problems. I would remove it and replace with Microsoft Security essentials at least to test.

Virus, Spyware & Malware Protection | Microsoft Security Essentials

Thank you for your advise
My friend had already formatted my computer but instead of using Norton, I am using MSE. Hope everything will be fine from now on...

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