Why does my SATA HDD become a removeable device after installing nVIDIA chipset driver under Windows XP ?

Related Model ( 70 )

GA-K8NSNXP (rev. 1.x)
GA-K8NS Pro (rev. 1.x)
GA-K8NS (rev. 1.x)
GA-K8NS-939 (rev. 1.x)
GA-K8NXP-SLI (rev. 1.0)
GA-K8NF-9 (rev. 1.x)
GA-K8NSC-939 (rev. 1.x)
GA-K8N Pro-SLI (rev. 1.0)
GA-K8NE (rev. 1.x)
GA-8N-SLI Royal (rev. 1.0)
GA-8N-SLI Pro (rev. 1.0)
GA-K8N-SLI (rev. 1.x)
GA-K8N51PVMT-9 (rev. 1.0)
GA-K8N51GMF-9 (rev. 1.0)
GA-8N-SLI (rev. 1.0)
GA-K8N51GMF (rev. 1.0)
GA-8N-SLI Quad Royal (rev. 1.1)
GA-K8NE (rev. 2.x)
GA-8N-SLI (rev. 1.1)
GA-K8NF-9 (rev. 2.x)
GA-K8N51PVM9-RH (rev. 1.0)
GA-K8NS (rev. 2.x)
GA-M51GM-S2G (rev. 1.x)
GA-M55plus-S3G (rev. 1.0)
GA-K8N51GMF-RH (rev. 1.0)
GA-M57SLI-S4 (rev. 1.0)
GA-K8N51PVMT-9-RH (rev. 1.0)
GA-K8N51GMF-9-RH (rev. 1.0)
GA-K8NF-9-RH (rev. 2.x)
GA-M59SLI-S5 (rev. 1.0)
GA-K8NE-RH (rev. 2.x)
GA-M55SLI-S4 (rev. 1.0)
GA-M59SLI-S4 (rev. 1.0)
GA-M55S-S3 (rev. 1.0)
GA-M61PM-S2 (rev. 1.0)
GA-M61VME-S2 (rev. 1.0)
GA-M57SLI-S4 (rev. 1.1)
GA-M55S-S3 (rev. 1.1)
GA-M55plus-S3G (rev. 2.1)
GA-M55plus-S3G (rev. 3.0)
GA-M61PM-S2 (rev. 2.0)
GA-M61VME-S2 (rev. 2.0)
GA-M55SLI-S4 (rev. 2.0)
GA-N680SLI-DQ6 (rev. 1.0)
GA-M61SME-S2 (rev. 2.x)
GA-M57SLI-DS4 (rev. 2.0)
GA-N650SLI-DS4 (rev. 1.0)
GA-M57SLI-S4 (rev. 2.0)
GA-N680SLI-DQ6 (rev. 2.0)
GA-M68SM-S2 (rev. 1.0)
GA-N650SLI-DS4L (rev. 1.0)
GA-73UM-S2H (rev. 1.0)
GA-73PVM-S2H (rev. 1.0)
GA-73VM-S2 (rev. 1.0)
GA-73PVM-S2 (rev. 1.0)
GA-M61PME-S2 (rev. 2.x)
GA-M78SM-S2H (rev. 1.0)
GA-M750SLI-DS4 (rev. 1.0)
GA-E7AUM-DS2H (rev. 1.0)
GA-M61PME-S2P (rev. 1.0)
GA-M68M-S2 (rev. 1.0)
GA-M61PME-S2P (rev. 1.3)
GA-M68M-S2P (rev. 1.0)
GA-M68MT-S2P (rev. 1.0)
GA-M68MT-D3 (rev. 2.3)
GA-M68M-S2P (rev. 2.3)
GA-M68MT-S2 (rev. 1.3)
GA-M68MT-S2P (rev. 3.0)
GA-M68MT-S2P (rev. 3.1)
GA-M68MT-S2 (rev. 3.1)

This is because nVIDIA chipset supports SATA Hot Swap function, you can see the SATA Device in the "safely remove hardware" wizard under Windows XP.
Please note that Windows will NOT allow you to remove a boot drive / system volume within this Windows utility.