Unable to instal Leap 15.2 alongside Windows 7 (laptop)

On my laptop I have Windows 7 installed. There are a few partitions and some unallocated space onto which I wanted to instal Leap 15.2.
The problem is that the installer doesn’t see any partitions, be it Windows or the unallocated space. Nor does it offer to shrink the C partition (with WIndows 7).
When it comes to partitioning during the installation, the installer only recognizes the whole disk (as if it wasn’t partitioned)
I used to be able to do this and now I’ve hit a dead end.
Below, in the google document, I put some printscreens. (some of them are print screens from Xterminal of Ubuntu I managed to take while in live mode). I tried also install Ubuntu but to no avail, and the people in the Ubuntu forum can’t seem to locate the problem, as well.
Does anyone have any idea how to fix this?


Perhaps your Windows 7 is using Windows Dynamic Disks - its a way of virtualizing (similar to LVM - logical volume management in linux).

I don’t have any experience with that. But it seems to fit your description.

You have primary partition 3 inside of extended partition 4 (or at least overlapping it). That is something that certainly is unusual. The question is whether kernel refuses to work with this partition table (providing dmesg output from Linux may give some hints) or installer does not like it. Seeing that parted returns an error and YaST partitioning tool is based on libparted I suspect it is the latter. I do not see any code in Linux that would refuse such configuration.

Even if you shrink disk C, you will not be able to use additional free space. You already have 4 primary partitions and free space will be outside of extended partition so unusable. You would need to actually move data and change partition configuration so that free space will be covered by extended partition. Far too much risk without full disk image level backup.

ILL you’re using legacy BIOS boot. Check whether you can use UEFI booting.
With UEFI boot you can use more than 4 primary partitions with GPT.

So if I merge all the remaining partitions + unallocated space so that I have partition C (with Windows) and partition D, will that help?
I need as clear instrutions as possible. The terminology you use won’t help me much, I’m a layman in terms of partitioning, no to mention linux.