You can't run Windows 10 64-bit on a PC that only has Windows 10 32-bit installed.
You can't run Windows 10 64-bit on a PC that only has Windows 10 32-bit installed.
In short, I had two hard drives with Windows installed. One was 64-bit and the other 32-bit. Last night the first HDD failed completely, and I couldn't connect it anymore. Even though my 32-bit Windows is running, it's not using the full 8 GB RAM I have and feels very slow. I tried installing a 64-bit version of Windows from Microsoft Creation Lab, but the installation always shows an error. Right now I don’t have a USB flash drive or a CD. My system runs a Core i3 540 with 8 GB DDR3 memory at 1333 MHz.
You'll need to purchase a different version. Installing 64-bit Windows isn't possible on a 32-bit system.