Install modified Logitech QuickCam Express / Go / Chat in Windows 7 / 8 / 10 (32bit, 64bit, x86, x86_64, amd64) without driver signature | Blog of Tobias Feigl
Logitech USB Camera Drivers v.8.4.1.1092, v.8.4.7.1032 download for Windows - deviceinbox.com