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100% disk usage

Microsoft Windows 10 (64-bit)

I am constantly facing this issue of 100% disk usage although my system performs at it's best once in a while and mostly functions poorly. In this the most common thing is that whenever it runs slow task manager shows 100% disk usage and whenever it runs perfectly task manager shows 2% disk usage other than that everything works properly. I have tried everything like disabling Cortana, search, SysMain (Superfetch) but I don't see any difference. Please Help

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HP Recommended

100% disk usage


This is a typical issue running Windows 10 ...


With a Win10 PC, you're going to experience a variety of problems not typical of the older PCs.

First is sluggishness. You may experience a very slow PC at times because Windows Update (WU) is hogging your PC, searching for, downloading, and installing updates -- to bring your PC up to the most current version of Windows. This can also contribute significantly to high processor temperatures, as it is being heavily used.

Second is fan noise. That's directly related to fan speed, which is the result of processor heat, and WU is known to drive up the processor load -- sometimes to 100%. That can cause the fan to run loud and continuous for some time.

Third is disk usage. WU can easily force the disk usage to 100% and and keep it pinned there for some time. That's because it writes WU files to the drive, then it turns around and reads them, then it overwrites existing Windows System files. All of that takes a lot of disk usage to complete.

These processes are compounded by Win10 because new Win 10 patches coming out nearly every Tuesday. Since you can't stop Updates like you did with Win7, this means you're going to get updates, regardless of what you do.

To find out what version and build of Win10 your PC is running, do the following:
1) enter "cmd" (without the quotes) into the search area and select the Command Prompt option
2) enter "winver" into the command window (again, without the quotes)
3) The most current Win10 versions as of 7/9/19 are the following:

a) v1803: Bld 17134.915

b) v1809: Bld 17763.615

c) v1903: Bld 18632.239.

If yours is older than that, most likely WU is hogging your PC trying to update it.

Some folks have been told that resetting your PC will fix this. but, if you reset your PC, you only make matters WORSE! Why? Because you will reset Win10 back to the original version that came preloaded on the PC and that will restart Windows Update all over again.

To disable WU temporarily, do the following:
1) Enter "services" in the search area (again, without the quotes)
2) When the window opens, scroll down until you see Windows Update
3) If it say Running under status, that indicates that WU is running
4) To change that, double-click on that task, select Stop under the Service status, and then Apply
5) That should stop WU -- and you should see an immediate improvement in performance.

If not, then WU is not the problem.

WU will restart itself automatically later on, so you basically have no choice than to bear with it until it finishes.

***If my post helped, click the White thumbs-up symbol to say thanks***

***Please mark Accept As Solution if my post solved your problem***

I am a volunteer and I do not work for, nor represent, HP
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100% disk usage



Thank you so much, I really appreciate the time and patience you put in but I hate to tell you that my pc is already up to date with the latest version installed in it ( W10 64bit, V:1903 )  and I have set WU on manual so it won't automatically look for WU. As far as my PC specs goes I think it's good enough to run Windows 10 properly. 


Processor-: Intel core i5-7200U CPU 2.5 GHz

Memory -: 8GB ram

Disk-: 1TB Toshiba MQ01ABD100

GPU-: Intel (R) HD Graphics 620, Nvidia 940Mx


There is no issue related to the fan of my Pc, It makes no sound whatsoever. Yet 100% Disk usage is Out of Question yet I am facing this issue. Please let me know if there is anymore solution to this problem because the above-mentioned solutions are not working.

***Especially My HDD is giving very Poor read and write speed.

P.S-: I have used 150 GB out of 932 GB HDD.

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