Re: Laptop advice
If you can put new batteries in a kids toy you're capable.
The tricky part for Joe public is what to do with the new drive iself / installing windows. Which, if you don't have a cd, involves creating a bootable usb drive, to enter the windows installer. Then for home laptops at least, you have to work out how to license it as it will ask for your license key.
Microsoft have made this easier you can assign your license to your outlook account and just sign in for license authentication. But to the average person yeah it's a faff.