please help

Dear sir/madam/sister/brother,

Today I followed[B] 'how to speed up a windows XP computer'
and 'Windows XP Services Removal Guide' (http://www.wikihow.com/Speed-up-a-Windows-XP-Computer).

then my computer internet connection (ADSL) does not work.

when I use 'create a new connection' , it worked.

But early automatically connect to internet when turn on my computer (broadband connection with modem).

even I select 'enable' it does not work,

please help me immediately.thanks

sameera