After 12 and a half years, Microsoft’s support for Windows XP – its most popular operating system – has ended. But millions still use it – as many as one in four PC users by some accounts. What happens now that Microsoft has washed its hands of XP and you haven’t upgraded to a new computer or new operating system? Don’t panic… you can still find help. Windows XP is no longer supported by Microsoft, meaning there will be no more patches or tech help from Microsoft. But your PC still works, it’s just unsupported…sort of like having your car go out of warranty after 50,000 miles. To understand your…