Don't Panic! You probably don't have the Conficker/Downadup/Kido worm
One fast way to check is to try to visit any major security software publisher's Web site.
If you've cleared your browser cache beforehand, and you can load the sites below then you're clean because Conficker blocks access to them.
There are some tools specific to this worm that you can download to clean up
Eset: Win32/Conficker Worm Removal Tool
Symantec's W32.Downadup Removal Tool
Sophos' Conficker Cleanup Tool
Don't Do This Unless you understand it!!!
To prevent infection form memory sticks, or USB drives, disable the Autorun feature
copy the text below into Notepad. It should be one line from the left bracket to the final quotation mark. save it as "StopAutoRun.reg"
right click the new file and choose merge
PS I dashed this off quickly