Why System Interrupts So High

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I have an Acer Aspire netbook (now retired to community computing), AO722. It has an AMD C60 processor and runs Windows 10 Home. I recently upgraded to 8 GB RAM and an SSD, requiring a fresh install of Windows from Media Creator. This should mean all drivers, etc. are up to date.

However, before and after the changes, almost very interaction drives System Interrupts to 100% for long periods of time, often more than 10 minutes. Google suggests this is a driver problem, but the fresh install fixed them, didn’t it?

What else do I need to look at?

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If you’re comfortable disabling various Windows 10 services (type “services” (no quotes) in Windows search box), there’s a myriad of them that can be safely disabled.  At last count, I disabled about 100 on my system.  Not all get started automatically.  They may be delayed start, or even ‘manual’ or ‘triggered’.  Setting them to ‘disabled’ guarantees they won’t start.

In particular, look for things that aren’t inside your computer.  In my on my Win 10 pro desktop computer, there’s neither Bluetooth nor Cellular hardware. Nor is Phone service, Radio Management (Wifi is from my wired router on my network) nor Mobile hotspot (Wifi feature).  Nor does my desktop have Smart cards (gone from laptops by 2000 or so), Telephony, Touch keyboard and handwriting (touch screen), or a Windows Camera.

Neither do I care about Geolocation, Language experience, Parental controls, Payments, Retail demo services, and XBOX.

I don’t do ‘virtual machines’ either, hence, all the Hyper-V entries are disabled as well.

Needless to say, my laptop has both Wifi and Bluetooth builtin, so those are enabled on my laptop.

After those ‘easy’ services have been disabled, reboot the computer and there will be fewer services running.

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I suspect a bad motherboard. You could try disabling all unused ports.

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the Acer Aspire AO722 laptop only has Win7 and Win8 drivers available from the Acer support site and has not been tested for Win10 compatibility

perhaps update the BIOS & firmware to the latest ones available from Acer

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System interrupts are the hardware trying to get the attention of the operating system.
It could mean your hardware is not happy and is generating interrupts when not required.

Try downloading a Linux live ISO, burn to USB and boot from that. Check the interrupts to see if it’s Windows or hardware.

This post shows how to do the same thing in Windows – it’s complicated.
performance – How can I find out what is causing interrupts on Windows? – Server Fault

cheers, Paul

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