Why is my NVMe drive not detected in Windows® 7?
To fix this issue, a hotfix must be downloaded and installed. The hotfix will add native driver support for NVM Express (NVMe) drives that use the PCI Express (PCIe) bus in Windows® 7. We recommend that you contact the manufacturer of your NVMe drive to locate the download links and installation instructions for the hotfix associated with your drive.
Microsoft has provided some information to address this issue. For additional information visit the Microsoft Support site.