Running an x86 OS on an ARM-based phone is resource-intensive. Keep these points in mind:
Termux cannot natively run Windows 7. Period. What these guides actually describe is using Termux to install: install windows 7 on termux
Emulation is significantly slower than native performance. Heavy applications or graphical games are generally unusable. Bluetooth keyboard and mouse is recommended for a usable desktop experience. VirtIO drivers Running an x86 OS on an ARM-based phone
: Most scripts work without needing to modify your Android system . install windows 7 on termux