Microsoft Store
Visit this link to install TeraCopy from the Microsoft Store: apps.microsoft.com/detail/XPDCCPPSK2XPQW
Winget
Press Win + R, type winget install CodeSector.TeraCopy and press Enter.
Silent mode
Please try running the teracopy.exe installer with /qr switch:
Press Win + R, type %userprofile%\Downloads\teracopy.exe /qr and press Enter.
You can also use /exenoui /quiet switches for a silent installation (without UI).