system interrupts using up my whole first core

[kimtaeyeon]

Hello i am having a problem with my cpu usage. System interrupts uses up 1 core of my cpu. I dont know what causes this.

 

Malwarebytes staff already helped me in case this is caused by a malware, but it was confirmed that there is no infection.

I alro ran xperf and I saw HDAudBus.sys having high DPC/ISR duration on the 0 core.

 

 

After seeing this i tried updating the drivers for 'High Definition Audio Controller' in the device manage but the problem still persists.

Would anyone help me with my problem?

 

Thanks!

[David H. Lipman]

What is the Make and Model of the platform in question ?

 

[kimtaeyeon]

4 minutes ago, David H. Lipman said:

What is the Make and Model of the platform in question ?

 

Hello.

This is a Lenovo-Legion-Y520-15IKBN laptop.

 

Thanks

[David H. Lipman]

Please completely remove the Audio Software and Driver combo from the Control Panel applet, Programs and Features and then Reboot.

Then re-install the latest software

https://download.lenovo.com/consumer/mobiles/bcyc05af06wg.exe

Reference:
Lenovo Legion Y520-15IKBN

Edited January 22, 2019 by David H. Lipman

[kimtaeyeon]

I've tried doing that too. But the problem is not going away. I'm also almost giving up in solving this.

 

Thanks

[David H. Lipman]

There is one last suggestion I have.  Are you willing to take one more step ?

 

[kimtaeyeon]

Ye. I'm still accepting suggestions. Thanks for helping!

[David H. Lipman]

Please download HWinfo

You can download the Portable version and run the 32bit or 64bit version accordingly.

It will list parameters of your system including "Motherboard".  Please go to that section and look for BIOS.  It will identify the BIOS Date and Version.

Please provide that.

Example:

 

 

[kimtaeyeon]

here it is

[David H. Lipman]

OK.  That shows your BIOS was 4KCN40WW  where the latest BIOS is 4KCN45WW 

BIOS Update for Windows 7 (64-bit), Windows 8.1 (64-bit), Windows 10 (64-bit) - Legion Y520-15IKBN 4KCN45WW

Reference:
Lenovo Legion Y520-15IKBN

NOTE: 
When installing BIOS do not be on battery, use the A/C Power Supply and do not interrupt the process.

 

Edited January 23, 2019 by David H. Lipman

[kimtaeyeon]

Hello,

I've updated my bios to 4KCN45WW. Currently, I haven't yet seen the problem come back. But i need to observe longer, as the problem sometimes shows up only after a few days (sometimes for only minutes since boot). I'll tell you if everything is fine, days later.

 

Thanks

[David H. Lipman]

Thanx for the update.

[kimtaeyeon]

well. it still shows up.

[David H. Lipman]

I'm sorry to hear that.  If it is a problem, you'll have to contact Lenovo.