Not just me then. I hated Windows 10 Calc so much, that I copied over calc.exe from Windows 7 and made the following registry change:

  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\CALC.EXE

  (Default)   C:\<PATH-TO-WINDOWS7-CALC>\calc.exe
  Path        C:\<PATH-TO-WINDOWS7-CALC>

Presto! Whenever you Win+R, Calc.exe - you get the Windows 7 one instead. This would work for any of the other apps listed in 'App Paths' too (or you can add your own).

I've done the same thing with paint.exe from Windows XP. I prefer that version to the one with the ribbon UI.

Had tried to do this before and did not work. As I'm curious, just tried it again and the Win7 calc just does not want to run.

So wondering why it would work on your end. Do you have an old .net runtime on your machine perchance?

Possibly. Or it's an earlier version of calc.exe I'm actually using - I'm not sure.

If you think you can trust me (you can!) - try this one:

http://www.jaruzel.com/files/calc.zip

Thanks. Pretty sure that it is not a Win7 version, your binary is from 2001 and only 100kB.

In that case I'll stick with Microsoft Calculator Plus from 2005. Now if you need a binary of that... then I can post a link for you. :)

Actually here you go: http://www.vimalin.com/download/CalcPlus.zip

The installer in the zip is signed by Microsoft.

Found your version :p Just bumped into my calc archives and did a binary compare with a Windows XP archive I had of it and it matched. So turns out it is from Windows XP and yes that one works.

Wow, XP?! Well, I still like it, and it's still better than the Windows 10 one :)

Agreed, turns out that it was the one I was using myself too. Until I just swapped it out for calculator plus. The only issue I had was that I wasn't able to setup a keyboard shortcut (Ctrl+Alt+C), but just figured that one out.

Turns out that if you create a shortcut via the send To "Desktop (Create shortcut)" that you can then set it up a keyboard shortcut via properties. As long as your shortcut is on the desktop or in the menu then the keyboard shortcut works. Yay.

But then since it was from xp and not win7 and you didn't know that, does that mean that your calc.exe is something you downloaded off some random site on the net trusting that it didn't contain malware?

Nope. I just have a crap memory.