Your computer will still work today just like it did yesterday. Problem is as time goes by it will become more and more vulnerable to hacking and intrusion. If you continue to use the computer with XP then don't do anything with finances, credit cards, bill paying, checking your bank accounts online or anything like that. Reading your options from the other threads you can get a new computer, if your current one is capable enough upgrade to windows 7 or windows 8, or put a free Linux operating system on your current machine such as Ubuntu.