Install Windows From External Hard Drive ((better)) -

You open Command Prompt as Administrator .

Here’s a short, narrative-style guide based on the phrase — told as if you’re the one doing it. You’ve got a laptop with a broken internal drive, or maybe you just want a fresh Windows install without burning a DVD or making a USB stick from scratch. All you have is an old external hard drive and a Windows ISO file. install windows from external hard drive

First, you open and delete all partitions on the external drive. Then you create a single primary partition, format it as NTFS , and mark it as active (so the computer knows it can boot from it). You open Command Prompt as Administrator