It doesn't matter if it's a PC or tablet, the same troubleshooting we've used for 14 years applies. If you can't get safe mode or such to work you reload the OS.
Any reason the make/model is not shared here?
I have a tablet PC XP machine, it tr'ys to start and before it can load windows, it shuts itself down then keeps repeating this process and for the life of me, I have no idea why. Any assistance would be greatly appreciated, thank you.