Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Deferred Procedure Calls and Interrupt Service Routines High CPU

01 Dec 2011   #1

Windows 7 Ultimate x64
Deferred Procedure Calls and Interrupt Service Routines High CPU


Recently I have noticed higher than normal CPU usage from my laptop which I know will reduce battery life, cause higher temperatures and slow the computers performance.

The task manager did not tell me too much so I decided to have a look in the Resource Manager.
Sure enough under the CPU tab of the Resource Manager there is a process called System Interrupts that has a description of "Deferred Procedure Calls and Interrupt Service Routines" with a average CPU usage of about 30%.

I did notice that when I first turn my laptop on and boot in to Windows that this process uses about 1 - 5 % CPU usage and my temperatures stay at about 28 - 32 degrees Celsius.

Usually after some time of using the laptop I notice this temprature rises to about 48 - 54 degrees Celsius and when I check the process it is using around 30% CPU usage, usually to resolve this I restart my laptop and everything goes back to normal and the process is back down to 1 - 5 % CPU usage.

I done a little research online and found that clean boot of Windows may solve the problem, I did this then re-installed all the required drivers from my system manufacturer, installed Avast Antivirus Pro then done a Windows Update.

Surely soon after I notice the same problem again, it may happen the same day I boot up the laptop or it may happen in a day or so, there is no set time when this happens and haven't noticed anything that I am doing that could trigger off this problem.

Kind Regards,

My System SpecsSystem Spec
04 Dec 2011   #2

Windows 7 Ultimate x64

I know I probably shouldn't do this though I'm bumping this since I edited the complete question.
My System SpecsSystem Spec

 Deferred Procedure Calls and Interrupt Service Routines High CPU

Thread Tools

Similar help and support threads
Thread Forum
High interrupt/DPC; culprit found, now what?
Gigabyte GA-MA785GPMT-UD2H, AMD Phenom II X3, Win7Pro64Sp1 I'm having two weird problems, that may be related, or maybe not. Some background... I built this machine five years ago, and recently decided to upgrade to an SSD, and to clean things up by reloading Windows, getting all current AMD...
Performance & Maintenance
Slow Skype Calls and High Ping!
I got my new computer for my birthday a few months ago (custom gaming computer) and ever since my sister got her laptop fixed the internet has been HORRIBLE. I cant do skype calls with my friends without skype crashing and when I play multiplayer games I get like 200-900 ping which practically...
Network & Sharing
Higher CPU usage due to Deferred Procedure Calls (DPC)
Running Windows 7 64-bit and just downloaded the lastest updates from Microsoft last night. Now my CPU is sitting at 20% due to Deferred Procedure Calls and Interupt Service Providers running constantly according to the resource monitor. What could cause this issue? Could it be a driver that...
Performance & Maintenance
Getting Deferred Procedure Calls and System Interrupts - Please Help
Getting Deferred Procedure Calls and System Interrupts - Please Help Issue occured after I perform input/output (I/O) operations from a Toshiba storage device External Storage device file movement input through USB Hard drive adapter: Manufacturer: Sabrent -UBS 2.0 to SATA Hard Drive Adapter...
Performance & Maintenance
USB transfer causes Interrupt Service 80% CPU usage.
Greetings.. I have a real annoying problem in Windows 7, whenever I try to transfer anything to a USB device, whether it is a Flash drive or a portable HD or Ipod, the transfer screen comes up, about 10% of the file is transferred then I loose all usb capabilities, (except keyboard and mouse) my...
Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 14:58.
Twitter Facebook Google+