This concerns an Acer 5750 laptop, running Windows 8 (64 bit).
The hard disk is partitioned, but I cannot access Drive D; on attempting to open it I am told that the disk must be formatted, but it will not format. On investigating I found this message:
"Base System Device PCI\VEN_14E4&DEV_16BE&SUBSYS_05041025&REV_10\4&2B4E00C3&0&02E0 The drivers for this device are not installed."

Can anyone advise? Thanks in advance
Paul