HiControl Android app works fine from a mobile device and "mirrors" the screen (without needing the TV turned on). Of course this does not run under Windows.
If you just want to use normal file functions from a network PC; copy, move, delete, rename/change files etc (i.e. not actually remote control of the Q10 Pro) you can simply access the SD card and also internal hard drive from a Windows PC using Network/share (turn on Samba share).
From Windows, it was easy to find: /share/sdcard (for internal card) OR /share/sda/sda2 (for internal hard drive)