Windows 7

See helpdeskgeek.com if something goes wrong.

You can replace the Windows calculator if you want.

Then you can hit the Windows Key and then type 'calc' and the calculator is up.

Right click on calc.exe and hit Properties.

Go to the Security Tab and hit Advanced.

Hit Edit and make yourself the owner. Close every window and hit Properties on calc.exe again.

This time we're gonna edit permissions. Click on Users (that's you).

Give full control to yourself. Hit okay.

Rename that shit to calc.exe.bak. Put Calculator.exe (this project) into calc.exe. Installation complete.

Windows 10

1. Open powershell (as administrator)
2. Get-AppxPackage *windowscalculator* | Remove-AppxPackage
3. Restart computer