Reinstalling Windows - Microsoft Community HI Moditha I'm Greg, an installation specialist, 10 years awarded Windows MVP, and Volunteer Moderator, here to help you Yes, you can and should wipe both drives clean during install Normally I'd suggest to unplug the second drive so it doesn't interfere, but I will walk you through how to assure this while wiping both drives, creating the necessary partitions on the M2 and leaving the HDD to format in Disk management afterwards So follow the gold standard Clean Install in this link