But first your post is missing make, model and if you are ready to do a factory restore.
If you forgot to get your files out I suggest the safe exit of removing the old HDD and installing to a new HDD. You can then put the old HDD into a case to copy out your files and then use it as a backup of the stuff you can't lose. Figure 50ish bucks.
For 2 days now, I have had a reboot loop on my computer. It started worse and slowly got better. Now there is nothing I can do. It started, whenever I'd turn on my PC it would flash a blue screen for 1 second and just keep restarting. I don't know how I got rid of that but now it's the same thing without the blue screen. It will always tell me to run startup repair but it cannot repair it and I have ran out of options, I have ran it in all of the safe modes and ran a hardware diagnostic and tried everything else. When spamming f8 it will also come up with a option to "Repair my PC" this takes me to the same thing just "Startup Repair" Although this one does not fail nor does it work. I'm out of ideas any help please?