This image was created by /u/kuebic@discuss.tchncs.de for this comment here: https://discuss.tchncs.de/comment/21735989. I had encouraged them to post it somewhere, but as far as I can tell, they never did.
Panel 1: “Installing Windows 20 years ago” screenshot of install wizard with just a couple buttons
Panel 2: “Installing Linux 20 years ago” screenshot of a busy command line
Panel 3: “Installing Windows today” screenshot of a busy command line
Panel 4: “Installing Linux today” screenshot of install wizard with just a couple buttons


I wouldn’t blame Windows for this one. In this case, this is likely because the Windows partition table wasn’t updated when you changed your C: partition, so Windows legitimately thought there was filesystem corruption because the size didn’t match its partition table.
You should always used the currently installed OS to free up space first, so it’s aware of the change. Then run the installer and install to the free space you made.
Or better yet, use separate physical drives for different OSes.
Problem is, Linux Mint installer says nothing about that as far as I recall, and just offers a convenient slider to allocate space between Windows and Linux.
And that was my first computer. Yeah, I am relatively new to computers.
But hey, I only lasted with Windows for 2 days. In Windows 10 I couldn’t even wrap my head around when to use Control Panel and when settings, because look, mature OS, we have Settings 1 and Settings 2.
In comparison, Linux Mint 20 MATE was far simpler, so having really used neither, I went with the easier one. However, that doesn’t mean I had any idea what I was doing. I didn’t even understand the concept of partitions.
Just imagine a total newbie.
“Where is the file stored?”
“On… the computer…?”
Fair enough, though Linux Mint also didn’t really know for sure what that partition was (other than assuming Windows because it was probably NTFS).
Disk partitioning is always a risk if you don’t know what you’re doing (and sometimes even when you do) which is why it’s always good to have backups!