Slow loading desktop and freezing issues

So for the past month I been having issues with logging in my computer. It would load my desktop slowly or freeze if I leave it the I see the mouse with the loading icon and it will load for an hour. I try restarting multi times. I also went into safe mode and it loads fine I disabled all my auto start up programs and tried logging in normally and still takes the same amount of time. This hasn't happened since a month or two ago.. I also tried turning off the fast boot thing.

Any ideas why its doing this. Also I want to try reinstalling windows ten how can I go about doing so if I don't own the disc becasue the upgrade offer..

Really need help I can only use my pc in safe mode as its not starting up correctly.. And I don't have the money to get my pc looked at.