How to Fix: SSD isn't detected by windows installer unless specific driver injected into installer

The issue you're experiencing is due to the M.2 drive not being detected by Windows installer unless a specific driver is injected into the installer. This is because Lenovo's Y900 RE-34ISZ Desktop (ideacentre) Type 90FK model has an undocumented M.2/NVMe slot.

🚀 Resolving the Issue

• Download and install the Lenovo M.2 driver from the official Lenovo website.
• Extract the driver files to a folder on your desktop, for example, 'Lenovo_M2_drivers'
• Navigate to the Windows installer's directory (usually located at C:ootootmgfw.efi) and add the extracted driver folder as a new directory using the 'Add Driver' option in the boot menu.

💡 Conclusion

After injecting the Lenovo M.2 driver into the Windows installer, your system should now detect and install the M.2 drive successfully.