I have windows xp my computer is slow . Its shuts down sometimes when I start it . I tried
To clean out as much stuff that I don't need. And it still is slow and still shuts down. I want to reboot my computer back to factory made but I don't have a disk is there any other way to do this

First its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread.

What brand and model? Does it have a recovery partition?

Might be worth trying some serious maintenance before taking the reinstall option.
There are some great tips here: https://www.askmehelpdesk.com/computers-beginners/frequently-ask-questions-about-computers-233870.html