During printing, sometimes it prints a couple of pages before shutting down. Not too long ago I already did sfc scan as well before the issue. Tried 2 usb ports but it's the same. I haven't tried going into bias. What does resetting bios do?During printing or after the printing is done? Have you tried different usb ports with the printer? Try running sfc /scannow to check for files clean up need. Did you try going into bios, under exit and select reset bios/reset optimal settings?
Already looked into it, only says "windows was not shutdown properly" during the time of printing and "shutdown was unexpected" I'm actually thinking of that, plugging in directly to my outlet since before I replaced the PSU I didn't have this issue, is it possible the PSU consumes more power than before? I don't if that will affect tho.Also take a look in Reliability History and Event Viewer. Either one or both may be capturing some error code, warning, or even an informational event just before or at the time of the shutdown.
Reliability History is much more user friendly and the time line format can be very revealing.
Event Viewer takes more time and effort:
http://www.tomshardware.com/faq/id-3128616/windows-event-viewer.html
Another thing you can try is to use another power source for the printer.
Temporarily provide printer power from another outlet and even a different circuit if possible.