left laptop on standby for 45 days?

Hp Pavilion entertainment PC
I have forgotten my laptop on standy before travelling, 45 days later I came back from travel and encountered the following:
It starts and as it tries to load Windows I get some error message on a blue screen which only stays on for about a second so I can’t read it. Then it reboots itself and I get a message saying there has been an unexpected error etc and asks me whether I want to try booting again normally, or in safe mode etc. I’ve tried in safe mode and all the other options but it just does the same thing. When the Windows XP logo appears and it seems to be loading, it then takes me to this blue screen with an error message and then straight away reboots itself.