My google.com not opening

i am not able to open Google.com site and also gmail.com and even can't goto sign in page whenever i type www.google.com and this message appears

Not Found

The requested URL /accounts/Login was not found on this server.

Apache/2.2.3 (CentOS) Server at www.google.com Port 443

but when i try google.com.pk its open but when click on sign in this message appears same

and youtube.com opens without any prob

i am using firefox plz help me is this error in my browser connection settings or at server thanks

Its working well for me. Try opening it from another browser.

Clear all the cookies and history?

i clear all cookies history even reinstall

i try opera IE chrome all still this prob

but when i use proxy in browser google works

i think now only one sulution left and that's Install fresh xp

Which broadband?

download and run this program to fix the issues : http://www.mvps.org/winhelp2002/hosts.zip

Thank you so much Xainnadeem you really did great job best of luck its solved