Welcome to the forum
Did you install some software just before the problem arose? Maybe some virtual drive software like Alcohol or Daemon Tools? Try to uninstall these software and see if this solve.
Try also this one. Shut down the PC, unplug the molex connector from the drive, and boot it again. Once windows run, shut down the PC, plug again the molex connector and boot the PC. Windows should identify again the drive and install automatically all needed drivers.