All these malicious programs can really become a serious problem if left unchecked for a long time. What you may need is a special software that may be able to scan your computer and search for unwanted programs like these and remove them effectively. Such programs may also be able to block such malicious programs from ever getting into your PC.
There are some software programs available online that offer you free scanning and removal of spyware from your PC. You can choose from a variety of legitimate programs that will be able to effectively do the job for you and for free. But most of the times, these free online spyware scanning and removal tools may not be able to provide you with the full protection that you need. You may need to purchase a spyware and adware removal software that may be able to provide you with the most comprehensive spyware protection that you need.