Is there a way to resize the display windows of a Hyper-V PC in Windows 10

Have you tried reducing the resolution of the Windows guest? Say 800x600?  Do this in the guest machine, not in the Hyper-V menu

800x600 is too small.  Below are the resolution option:

 

Better put, we think the question should be:

Can we change the resolution other the ones that is displayed?
(by simply dragging the corner of the VPC screen to our accord)

In Windows 7 you can try custom scaling and that should work. It may give less than perfect text.

Another alternative solution is to use VMware Workstation instead and install the VMware tools in the Windows 7 guest. Then you can use VMware to resize the guest to any resolution you wish. I do this on my small screen.

How do we get to custom scaling?

Go to Display Settings and there is a scaling option. Choose a lower resolution and scale from there. If that only affects text and icons and does not stop scroll bars, then you will need to change to VMware Workstation.

then custom scaling will not work for us since it will not delete the annoying scroll bars.

Unfortunately, we don't want to move from Hyper-V to VMware.

So hope there is a solution.

Like always Thanx for your patience and assistance.

Hyper-V is a specific solution that (in total) is much weaker than VMware. So then there is not much you can do in this case other than to try a smaller resolution like 800x600. This is workable for most applications so maybe re-think overall resolution.

We can use 1152x864 instead 800x600, but we want to use the higher ones (1600x1200 and 1280x1024),  without the scroll bars.

We don't want to change VM. it's just we been with Hyper-V for long time that's hard to considering changing.

So in your opinion, our Hyper-V cannot scale higher resolution of 1152x864 without the scroll bars?

You cannot use higher resolution than the screen allows. This is even true in VMware Workstation. The resolution scales down to what works without scroll bars. So in my case, say, that would be less than 1152x864. So VMware won't solve your problem because you (or your users) won't accept a lower resolution.

Put another way, Windows 10 will go no lower than 1024x768 and VMware cannot force it smaller, so then if I were to use Windows 10 as a VM there would be scroll bars.

What I meant by re-sizing is shown below. I do not know if you can put in the non-standard resolution, VMware forces it into the scaling option and it is not there normally.

Here is (I think) the registry key for screen display resolution. There is well more than one key, so be VERY careful. You may be able to emulate what VMware does and pick the largest resolution you can.

So in conclusion, it's not possible due to apps design.

Understood.

Yes, not possible in your environment due to design.  Just use the largest possible resolution.  Good luck and thank you.