Hi, When a Seagate hard disk (ST3500418AS) or Plextor SSD are connected to my Windows 7 x64 Ultimate installation, no driver is found even via Windows Update. The drivers should be included in Windows 7 hence AFAIK there are no such drivers available from the manufacturer's sites. BTW, the drives previously worked on the machine, so it appears that something has gone awry. Also, both drives are recognised in the BIOS. MS Security Essentials and also Malwarebytes Anti-Malware can not find any viruses or malware. Any suggestions?.