my IE cant browse pages due to Alexa or adware..i m not sure

some one pls help..in the 1st place my pc have the adware secondthougths..so i use the ad aware and it found 81objects i deleted em and then i also deleted the quarantined files..i tot it mmustbe deleted.

now the program found the Alexa in the registry and prompt me to delete it..i did the same bt it comes back wen i connect online and i am not able to browse the IE even i mamconnected to the internet..my msn messenger also cant be connected..i have reinstall the IE bt it still cant work..can i know wat is happening to my pc..i have to use my friend's pc to surf the net nw..