Windows 10: Very High CPU Usage, especially after sleep mode

Hi, For nearly a year I have experienced very high CPU usage with my laptop, despite disabling searches and other programs. I do not run heavy applications, only Outlook, Excel, web browsers, Word, throughout the day. After a few days of not restarting or shutting down my laptop, the performance is incredibly slow Especially for 40gbs of RAM. I have tried swapping out hardware, via Lenovo, which has not fixed the problem. I'm fairly convinced it's a Windows related issue. If I do shut the computer down, it is very fast for the next day or so, but the slowness starts again. Sometimes, a

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CPU high usage after update win10 1709

Hello,

FYI, I already follow your suggestion, I let my notebook overnight run without in sleep mode. But msbuild.exe still running and make my CPU high usage.

 

CPU high usage after update win10 1709

While it is normal to see a high CPU usage after the semi-annual full build updates (as described on
this link), it should typically finish the work within a few hours. However I do see sometimes that the computers are set to go to sleep mode
and so the work gets interrupted and it has to start again or take longer, so I usually suggest setting your computer to "do not sleep when plugged in" and let it run overnight if needed.

 

"System" process with high CPU usage

I have exactly the same issue (high CPU usage) on a brand new HP ProBook 440 G5 (i7-8550U, pre-installed Win 10 Pro).

I am pretty sure that there is a problem with audio drivers when the computer wakes up from a sleep mode. I first observed that process flow.exe (audio bloatware provided by HP/Conexant) was consuming (after waking up) ~10–15 % CPU. Here's what I did:

• I have updated Windows to 1709, build 16229.251 and installed all updates --> Nothing has changed.
  
• I have updated BIOS to the latest version provided by HP. --> Nothing has changed.
• I have run Windows troubleshooting and HP Support Assistant checks --> No problems found, nothing has changed
• I have manually updated Conexant ISST Audio Drivers (via Device Manager -> Update drivers). Windows installed a newer version. -->
  CPU usage by flow.exe has disappeared, but process called System in thread ACPI.sys+0x21cb0 started consuming ~20 % CPU.
• I have uninstalled all Conexant software&drivers and manually installed generic High Definition Audio Device drivers provided by Microsoft (Driver Date: 21.02.2018). --> ACPI.sys+0x21cb0 still consumes ~20 % CPU.

Same issues are discussed in these threads on HP site:

• ProBook 450 with high CPU usage - HP Support Community - 6520063
  
• HP Probook 440 G5 Fan issue - HP Support Community - 6567212

The result is I cannot use sleep mode (as advised by this post:
https://h30434.www3.hp.com/t5/Business-Notebooks/ProBook-450-with-high-CPU-usage/m-p/6611446/highlight/true#M149605).