Recently Purchased New Prebuilt gaming PC, worked fine at first but now weird things are happening #cpsupport

Purchased a C series pc, worked like a dream. Weird things began happening gradually. At first the sleep mode for the computer just.... completely vanished. The option itself just does not exist anymore. Second, the keyboard no longer lights up. All the keys still work but there are no RGB lights displaying making it almost impossible to use it in mid and low light levels. I began getting a strange error report every time I started it up, the "AMD software detected a driver time out has occurred on your system." error report. Finally, I can no longer play any sort of game in full screen mode as it causes heavy lag and screen tearing. The lag is only visual as the PC itself still runs incredibly fast.

If it wasn't obvious I'm not super techy if you have any ideas as to why this is happening please explain it like I'm 5.