Mimi, you don't have to give up your computer. You have an option. It is not the computer that is the problem, it is the internet. You can keep your xp, just don't go online. You can have Win 8, just don't go online with it. The devil is in control of this world to the degree God allows. Google, Facebook, and Microsoft are not being led by God. They are immoral.
That said, you can have a second cheap computer that goes online, but has nothing in the computer that you do not want others to see. I refuse to use many Google apps on my phone because I don't want them to know where I am and what I am doing. It is none of their business. I am going to refuse to reply to gmail messages because what I say in that email is logged by Google even though I have not given them permission to do so. We all will be looking for another op since Microsoft does not value our privacy. I quit using their browser years ago. And, I don't make provision for their oddities when formatting a website. If someone is using their browser and things don't look good, sorry. Get another browser.