Look for these custom methods under \_SB.PCI0.LPCB.EC0 (or similar):
While HP did not release a 4540s-specific Windows 10 driver for this older sensor, a newer version often works: : sp88981.exe (Version 7.0.2.1). Alternative (if above fails) : sp71714.exe. Windows 7 / 8 (64-bit) Recommended Driver : sp62981.exe. ⚠️ Troubleshooting "Unknown Device" acpi hpq6000 hp pro 4540s
The acpi-hpq6000 driver (sometimes called hp-wmi or hp_accel depending on the kernel) manages HP-specific ACPI extensions. Look for these custom methods under \_SB
If HP Support Assistant fails or you prefer manual control, use the legacy driver archive. acpi hpq6000 hp pro 4540s
Download 3D DriveGuard Software v5.2.2.1 Rev.A (sp71717) .
