Thank you all for your replies
MS daisy I know I could have downloaded a ISO file but I decided to buy helps towards making Ubuntu better and saves me a lot of hassle loll.
I have had problems trying to download avast today tried to install and got error
so I tried again and I got all this script a full page of it on my screen so I quickly came out of the browser, I need to scan my PC as I use an external drive and usb sticks in windows and I don't want to infect the other PC.