Step 2: Make an Existing Account into Administrator
Ok. Remember that batch file you made? Well, keep it. We can modify it to just make work for an existing account. For this file, all you need is two line of text. This is what you type:
net localgroup administrators USERNAME /add
Save this the same way that you saved the file in Step 2.
As with last time, adjust the part where it says USERNAME to a username of your choice. I personally chose ChuckNorris.