Hi there and welcome
Can you start the computer and keep tapping F8 until you get to a menu where you will see options such as Safe Mode ect.
Are you able to get to this menu?
Please let me know.
Choose Advance Boot Options, then last known good configuration
Let this complete and when it does, tell me if it then starts please
ok, this blue screen, do you see an error code like 0x3434343?
If so, can you tell me the code please
ok, whats the exact wording on this blue screen please?
ok, start the computer tapping F8 until you get to the menu and choose Safe Mode Command Prompt
This should bring you to a screen you can type
Are you able to get to this?
What is the make and model of the computer?