Nov 09, · To fix the issue of usable RAM less than installed Windows 10, you can uncheck this option. Step 1: Open the Run window by pressing Win + R, type msconfig, and click OK to open the System Configuration window. Step 2: Go to the Boot tab, choose the current installed OS, and click Advanced options. Step 3: Uncheck the option of Maximum memory Estimated Reading Time: 4 mins. Feb 09, · Access your system manufacturer’s website to download and install the latest BIOS version on your system. Before moving with the solutions to make your RAM fully usable in Windows 10, check if booting the system with the bare minimum (make sure to empty the PCI slots e.g., removing a PCI network card) resolves the issue.
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