Several options (not exhausted)

You didn't say what you want. I assume that you want to be able to use a computer until after 6 days.

1. remove Windows XP and install a version of Windows that isn't required to be activated
2. remove Windows XP and install an operating system other than Windows
3. buy a new computer installed with an OEM version of Windows XP
4. buy a new computer installed with an operating system other than Windows
5. find a version of Windows XP that isn't required to be activated
6. buy a standalone version of Windows XP
7. find a hacking method solve the problem