System stops loading

Thought I'd throw this out there to see if anyone has any ideas as to why this is happening....

Windows XP - Home

During boot all seems ok, "Black" Windows XP screen appears, load continues,
"Light Blue" welcome screen appears and everything stops. I can't say the system "freezes" as I still have mouse movement but the O.S. stops loading and just hangs.

Any thoughts as to why this is happening?

Thx

 

Can you get to safe mode?

What were the last hardware and software changes you made?

Studio T