How do I reboot if my laptop won\'t start windows?

[vbu18whln]

My laptop went to a white screen and will not respond. I held the off button until it shut off and I left it off for 30 min. and turned it on again only to get a white screen again the question is where do I go from here.

 

[ksiemb]

My laptop went to a white screen and will not respond. I held the off button until it shut off and I left it off for 30 min. and turned it on again only to get a white screen again the question is where do I go from here.

XP Recovery Options
http://www.ehow.com/list_6657748_windows-xp-recovery-options.html