IF you are on cable you will also want to make sure you get all the updates before you scan and remove the adware/spyware. Then I would disconnect your connection to the internet. The reason being is that there are some trojans who's sole purpose is to drop adware on your PC, they sit and watch to see if you have the payload. If you remove the adware without removing the trojans then usually the next time you reboot or connect to the internet they come back. So make sure you have anti-virus software, I recommend Mcafee only because I know it can find spyware related objects also.