Understanding the chipset is vital because the "Quantum" name is often just a sticker. The actual driver depends on the internal chip. In most cases, the QHM 480 LM uses a Sonix or Z-star (ZS0211) chipset.
Native drivers do not exist, but you can attempt generic USB video class fallback: quantum pc camera qhm 480 lm driver
Realistic recommendation: Buy a modern webcam ($20–30) instead of spending hours troubleshooting a 15+ year old 0.3MP camera. Understanding the chipset is vital because the "Quantum"
If you get the driver working, use these lightweight apps: Native drivers do not exist, but you can