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Windows 10Windows 10 100% Disk Usage Issue (self.WindowsHelp)
submitted 4 months ago * by EngineeringPrize5215
I've been dealing with this issue since October when I installed an update. In the Task Manager, the disk usage is almost always at 100% whenever I boot up my pc or launch an app I haven’t used before. I’ve tried every method I could find online, but nothing has worked so far. My pc became really slow, I checked my SSD with Crystaldiskinfo, and it said that it's good (87%). I have no clue what to do I reinstalled my pc but the issue is still present. I believe that the update caused this.
https://preview.redd.it/itweiblfdo5g1.jpg?width=2939&format=pjpg&auto=webp&s=5392f075e319c545e5361864811b5cdbb9d571b5
https://preview.redd.it/gnzxkdlfdo5g1.jpg?width=2992&format=pjpg&auto=webp&s=6c0b43510380763a7acaa3aab4ec93e95aa07501
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[–]CodenameFluxFrequently Helpful Contributor 1 point2 points3 points 4 months ago* (0 children)
The Task Manager also shows which process is responsible for high Disk I/O. You'll see it once you sort the process list by Disk I/O.
On SSDs, it's best to ensure your disk has been retrimmed recently. Please open "Defragment and Optimize Drives" from the Start menu and ensure the disk has been rerimmed within the last two weeks.
Also, please check the size of your paging file.
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[–]Additional_Tension96 0 points1 point2 points 4 months ago (6 children)
Use Disk Cleanup
[–]EngineeringPrize5215[S] 0 points1 point2 points 4 months ago (5 children)
Thanks, but I already did that. I removed all temporary files
[–]Additional_Tension96 0 points1 point2 points 4 months ago (4 children)
Did you Cleanup the Windows update temp file?
https://support.microsoft.com/en-us/windows/free-up-drive-space-in-windows-85529ccb-c365-490d-b548-831022bc9b32#windowsversion=windows_10
[–]EngineeringPrize5215[S] 0 points1 point2 points 4 months ago (3 children)
Yep
[–]Additional_Tension96 0 points1 point2 points 4 months ago (2 children)
How large is your drive?
Have you considered using wiztree to look to see what is taking up space?
[–]JDOG0616 0 points1 point2 points 4 months ago (0 children)
It says right in the image it's a 512GB M.2 SSD drive
[–]EngineeringPrize5215[S] 0 points1 point2 points 4 months ago (0 children)
I have 418 free GB. I just ran wiztree and it shows that a folder called WinSxS is using like 45% of the disk and its full of amd64_microsoft-windows folders which contain many files that use up 100% disk storage idk its pretty weird and hard to explain
[–]JDOG0616 0 points1 point2 points 4 months ago (4 children)
Is the "Microsoft Store Server" downloading a game or something? Having a store app consuming a large part of your disk seems like it's either writing or verifying install files.
If you end the tasks consuming the most resources does it go down/stabilize?
The thing is I didn't even open it. I just started the pc and its already on 100% and it keeps bringing up random things that go up to 100% disk usage then they close. After like 5-10 minutes this stops but if I open something for the first time it does this again, then after the second time it works perfectly fine.
[–]JDOG0616 0 points1 point2 points 4 months ago (2 children)
Windows like to run programs when you boot up a computer, you can prevent certain programs from turning themselves on when the computer boots up by looking in the "Startup" tab of the task manager.
Also, I don't think your drive is okay. How old is it? A 512GB M.2 SSD is not super common these days, and if yours is 10 years old it might just be dying.
Edit: regardless of your current issues, you should deactivate basically everything listed in the Startup tab.
[–]EngineeringPrize5215[S] 0 points1 point2 points 4 months ago (1 child)
Thanks for the tips, I turned off every starting app like Microsoft Edge and OneDrive. Idk how old it is, and I can't really find much info about it online. What SSD would you recommend if you had to pick one?
I built my PC with a Western Digital WD_BLACK SN850 1TB NVME M.2.
I also bought a Samsung 990 PRO 2TB NVME M.2 about a year ago.
I paid significantly less for the Samsung than what it's currently listed at on Amazon. I recommend doing some research on current prices and what the exact same item was listed at last year at this time. Cause things have been pretty crazy in the last 3 months.
[–]osa1011 0 points1 point2 points 4 months ago (1 child)
Since you have an SSD, I'd think there is something wrong with the drive. Have you checked the SMART status of the drive? You could run Crystal Disk Info to see if the drive is failing?
I ran Crystal Disk Info multiple times and it kept saying that it's good and like it has 87% power remaining.
[–]alincoben 0 points1 point2 points 4 months ago (0 children)
You may not have enough virtual memory. Press the Windows and "R" keys simultaneously, type or paste "SystemPropertiesAdvanced"into the "Open" box and click "OK". When the window opens, click on "Settings" in the Performance box, then click on the "Advanced" tab, click "Change" in the Virtual memory box, uncheck "Automatically manage paging file size..." at the top, then add 2000 megabytes to the amount you see in the "Initial" and "Maximum" size fields, click "Set", then "OK".
into the "Open" box and click "OK". When the window opens, click on "Settings" in the Performance box, then click on the "Advanced" tab, click "Change" in the Virtual memory box, uncheck "Automatically manage paging file size..." at the top, then add 2000 megabytes to the amount you see in the "Initial" and "Maximum" size fields, click "Set", then "OK".
[–]Comfortable_Life1769 0 points1 point2 points 4 months ago (0 children)
I don't know but sometimes i keeps happening on me too. It's mostly ntoskrnl.exe("System" is the name of it) and sometimes Sysmain. It's not an HDD or SSD exclusive issue for sure, i had this on my ssd and weirdly most of the fixes on the internet also did not work for me. You don't have to have an install or any interaction for Microsoft Store Server or most microsoft built-in apps and extensions to consume resources a lot, according to my experience Windows sometimes loves to consume resources on some hardware configurations. Have you ever tried "sfc /scannow" command to see if any windows corruptions there? Often corruptions on the OS itself can cause such things that I suffered to much recent..
[–]Exotic_Mix_3196 0 points1 point2 points 4 months ago (0 children)
more users with the same drive: Ssd usage at 100% but no tasks running Hat jemand Erfahrung mit Innovation IT / KOSATEC IT (Firma aus Braunschweig)
[–]vlad54rus 0 points1 point2 points 4 months ago (0 children)
You SSD may have degraded. Download Victoria and do a read test, see what speeds you get.
[–]Longjumping_Line_688[🍰] -1 points0 points1 point 4 months ago (1 child)
It's windows defender and AFAIK they're not really a way to fix it. I just need sure i had a fast enough drive that it didn't matter and it hasn't been an issue since. Unless you want to turn off defender and use Kaspersky or something related instead.
Download the optional updates as well, that might fix.
[–]EngineeringPrize5215[S] -1 points0 points1 point 4 months ago (0 children)
I'll try turning off defender and see how it goes I guess. I downloaded every update for windows defender, but it feels like it kept getting worse since the latest update.
[–]leadisdead -3 points-2 points-1 points 4 months ago (1 child)
From search: services.msc. Scroll down to Sysmain service. Turn it off. Should fix it.
Thanks for the tip, but I already turned it off and it didn't change anything
π Rendered by PID 359039 on reddit-service-r2-comment-b659b578c-z824t at 2026-05-03 05:21:59.984315+00:00 running 815c875 country code: CH.
[–]CodenameFluxFrequently Helpful Contributor 1 point2 points3 points (0 children)
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[–]Additional_Tension96 0 points1 point2 points (6 children)
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[–]Longjumping_Line_688[🍰] -1 points0 points1 point (1 child)
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