Hard drive replacement and windows

[yappmarie]

So I just bought a 1 terabyte hard drive blue WD for my Acer V3 but I don't have the discs for windows, my computer didn't come with them and I never backed up to Drive. will my computer automatically download those when I put the new hard drive in or is there something else I'm going to need to do, am I going to have to buy new discs from Microsoft for Windows

 

[USAFRet]

So I just bought a 1 terabyte hard drive blue WD for my Acer V3 but I don't have the discs for windows, my computer didn't come with them and I never backed up to Drive. will my computer automatically download those when I put the new hard drive in or is there something else I'm going to need to do, am I going to have to buy new discs from Microsoft for Windows

Just inserting a new drive does not automagically download or install anything.
You'll need to either clone everything from the old drive to a new one, or do a clean OS install on the new drive.

Why are you changing this drive?

There are means to transfer to this new drive, but being a latop increases the difficulty factor.