Hello everyone

My wife's HP tablet with Windows 8.1 has a 20 GB internal drive, and the Windows folder takes up 15 GB. That seems excessive to me. Do you know of a guide or checklist or something about how to reduce the footprint of Windows on the tablet?

[Oh, and an awful thing happened: she had Office 15 on it, and I saw that there is an uninstaller for Office 365, so I ran it because she doesn't use Office 365 (she only uses Office 15). Alas, that uninstaller then went ahead and removed Office 15. Very silly.]