I have came to know that we can logon to windows xp without knowing password of administrator. Is possible without use of third party software. My friend told me its some thing use of guest account though it is off.
1st things...try to read the Forum rules b4 reading
and if u want to knw abt security flaw in XP thn try reading this:
*www.techfreakiez.com/component/content/article/37-tips/90-windows-xp-the-security-holes.html