Andy B, if you are happy with your computer running XP, why not consider keeping it offline and use it for music, photo's, letters etc. and perhaps buy an ipad or one of the other excellent tablets that are available for your online activity?
I suggest this as they are fast, convenient and able to perform all of the tasks that you may need online.
They have a smaller storage capacity than a computer Hard Drive but there is the option of cloud storage, or some can extend their capacity by storing on a USB memory stick or a card, which you could also use to transfer files to your XP computer!
It is also possible to print via Wi Fi or the Cloud too.
They are so convenient that I use mine whilst watching TV or just to play catchup on news. They are also mobile enough to take with you when making a purchase of any large items to compare prices in store with others online which has helped me get a price match reduction a few times!
Before I get carried away..........just a thought!

Do nothing and nothing happens.