Win 11 c drive is 77GB. Normal? or time to clean install?

I used to spend all my time on linux so didn't care, now, for a while, I am back to only win 11. Linux partition is erased.
Seems excessive! Been a while since I did a clean install - maybe time?
I have all my 44GB of source stuff on a separate partition so that is not included in C. Games are on different partitions.
Yes I have done a CP/Win Tools/Disk cleanup but doing it now just to be sure. (I got back 0.6GB.)
Thanks!

Edition Windows 11 Pro
Version 25H2
Installed on ‎Sun ‎8/‎24/‎2025
OS build 26200.8246
Experience Windows Feature Experience Pack 1000.26100.297.0

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-- Asus ROG STRIX Z790-E Gaming wifi-6E, I9-13900k, UEFI/GPT, 32GB, Sam 980 Pro 1T M.2, Win11 24H2, GeForce RTX™ 3060 Ti VISION OC 8G (rev. 2.0) parts: Lian Li 207 case, Corsair RM750E PSU, Arctic liquid freezer iii Pro 360 aio. lasers: HP M254dw color, HP 4001dw. Epson scanner. Terabyte.

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77 used; 39 available; not time to panic yet.

How much of the 77 is taken up by System Restore?

Fishmill said:

77 used; 39 available; not time to panic yet.

How much of the 77 is taken up by System Restore?

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Where would I find "system restore"? I have win backup shut off. I use Terabyte to image my partitions and drives and that backup goes to yet another drive and partition. I have 3 1T NVMe's.

Been a while since I did a clean install - maybe time

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- I've not done one or needed to on my 2 Win 10 laptops in 8 years or so.. and they have a LOT of progs installed.

That 77GB, assuming it's the used space onyour Windows partition includes:
- installed programs
- personal data in the default library folders - and that often includes folders related to installed progs
- Store apps
- Browser-related data
Etc.

So you need to see where your space has gone.

Wiztree (free) is a very good way to see everything, viewed in 2 different ways:


The cushion map at the bottom immediately shows where most space has gone at at glace- the largest square or rectangle. Simply hover over it to see details.

Type "system restore" into the search box; that should lead you there.

No telling how much space it is using. Could be 10 or 20 gb, but you can control the maximum.

I do not store personal files or the .exe etc files (used to install all my stuff) on the C partition - that is all on the E partition.
I use tree size free but here it is in your form:

edit - I just uninstalled Blackmagic/Davinci Resolve and that brought me down to 70.9GB. Still strikes me an awful lot. Yes, I know that some folks never do clean installs but I do not live in that world. :)

attached pics now represent that...

@Fishmill - zero.

Thank you very much for your polite, kind and gracious reply.

What do YOU think is odd about what you've posted?

It could have been helpful also to post the cushion map as I carefully did for you.

Space is not simply taken up by folders under C: as you saw from my cushion map. Wiztree shows the 'hidden' areas on the disk too.