I have an iBuypower desktop PC that came preloaded with windows 8. The computer worked perfectly for a few weeks and then fell into the dreaded repair loop.
I made a recovery USB and it works perfectly. The problem is that once I reset my computer, losing all of my data in the process, I have less than a day before it does it again. How do I prevent this repair loop? I repeat how do I prevent this from happening? If I can't find a solution could I downgrade to windows 7. I need this PC to work for more than a day at a time.

As per your description, I understand that you often get repair loop on your Windows 8 computer. I will certainly help you with the same. However, we need few more details to understand the cause of the issue better. Without finding the cause of the issue, we cannot suggest critical troubleshooting.

Do you get any error message during the repair loop?
Have you recently made any changes on your computer, prior to the issue?
Have you installed any third party antivirus/security software on your computer?
Is there any Windows Update which has been failed recently?
Note:To know the KB numbers of the windows updates, follow the underlying steps:
Press Windows + C to open charms bar.
In the search box, type Update, and then, in the list of results, click Windows Update.
In the left pane, click View update history.

Ensure that all the Windows Updates are installed on your computer as the issue may be occurring due to some missing security updates.

Please follow the steps to install available Windows Updates.

Press Windows + C, type Windows Update in the Search box, then click Windows Update in the results pane.
Click Check for Updates. After the scan is complete, click Review optional updates.
Click the check box next to the updates, then click Install updates.
If prompted, review the license agreement, then click I Accept.
Follow the onscreen instructions to download and install the updates. If prompted, reboot your computer.
As of now, I suggest you to go through the article based on Event Logs which include the steps on how to collect event logs of your computer. This will help us to know the root cause of the issue.