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System & Reserved taking up 100+ GB of space

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So I've been having this issue where my windows system and reserved space is taking up way over 100+ GB of storage on my PC which is far from normal. I've tried a few things already and gotten nowhere. I even tried using the index options method and performed a restart along with tried using TreeSize to see if I could find where the files were stored but nothing abnormal showed there either. I honestly have no clue at this point as I've never had this issue on any PC before.

Hello,

Thanks for reaching out! I'm Microsoft user like you.

System Reserve space is used to WinSxS folder and update folders.

1. Cleanup below Temp folders location -> Open Start -> Run -> Type below location one-by-one and press enter
-> C:\Windows\Temp
-> %USERPROFILE%\AppData\Local\Temp

2. Run Disk Cleanup from Select C:\ Drive from Properties- > General -> Disk Cleanup - >Cleanup system files

In case of additional questions, reach out back to me, and I will be happy to help and try our best to resolve your issue.

Best Regards,
Prakash

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Yeah I tried this method earlier on today and then performed a restart but it still seems the same even after trying it again

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Hello,

Thank you for your reply and providing Information.

Please download and run TreeSize Free tool then run and Analyze on C:\ drive, After that attach screenshot of the result to assist you furhter.

Best Regards,
Prakash

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That's it here.

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Hello,

Thank you for your reply and providing screenshot.

As per my research it is not possible to change size of these reserved space , However You can disable or enable Reserved Storage on Windows 11 using below DISM command.

DISM /Online /Set-ReservedStorageState /State:Disabled


https://www.tomshardware.com/how-to/save-space-...

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it Hope this information would be useful to you. Please feel free to get back if you need any additional info.


Best Regards,
Prakash

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Hello,

Thank you for your reply and providing screenshot.

As per my research it is not possible to change size of these reserved space , However You can disable or enable Reserved Storage on Windows 11 using below DISM command.

DISM /Online /Set-ReservedStorageState /State:Disabled


https://www.tomshardware.com/how-to/save-space-...

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it Hope this information would be useful to you. Please feel free to get back if you need any additional info.


Best Regards,
Prakash

Ahh ok it's just a bit weird how everyone else I talk to on this only has like 30GB or so used up by "System & Reserved" yet I'm at nearly 150GB so it's a bit stupid tbh but I'll just disable that for now I'm on windows 10 though so I'll need to google the method for that on a win 10 pc which I think i may have done before somewhere before. Something definitely isn't right though.

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You need to expand the top use folders to see more detail.

Program Files (x86) is a bit high but will be currently programs installed.

21.3GB (3 files) is a touch unusual. (without knowing what they are)

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Hello,

Thank you for your reply and providing Information.

I can understand your situation. I would suggest you to please provide your valuable feedback to Microsoft product team using Feedback hub.

https://support.microsoft.com/windows/59187f8-8...

Best Regards,
Prakash

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Last updated April 25, 2025 Views 12,443 Applies to: