what is this virus???

here is the story :
my sis use my comp and then after she succesfully dialup the
connection there is a popup saying "your computer has a virus ,do you want to scan" and then she click ok
but after that it is like this is the virus :confused:
my icons were screwed up ,my dialup connection icon become black
my opera icon become pink:mad:
my symantec (norton) become pink also
and lots of my icons become pink
help ,what is this virus ?????
how to get rid of it???
pls help thank you in advance