Hello,
I have a pavillion 15 n220nr straight from the box. Product # 5CD4083V74. Windows 8.1 64 bit came preloaded on the machine. No discs came with it.
The computer often doesn't load at all, freezing at a black screen or with the HP logo on it. Other times it will go to an autmatic repair screen. I have had two seperate blue screen of death errors. Once it said CLOCK WATCHDOG TIMEOUT and another time it said DRIVER POWER STATE FAILURE. One time I got a Redir.exe - Application Error saying the memory could not be read. Sometimes the machine starts fine and works for anything from 30 seconds to about five minutes. In that time I've created an account and then checked the drivers.
Reading guides on this website I've updated BIOS, I have checked what drivers need updating but when I tried to download them the computer crashed. There were about six needing an update. I checked for any problems with the hardware using the built in diagnostic tool, was all clear. I removed the memory and reinstalled it. I did a full system restore. The problems still persist.
Please help. Thanks!