Anti Virus & Malware
Malwarebytes
Probably the best Malware remover available. The free version runs on demand. There are frequent updates, with the free version you should download them preferably before you run it, but you get plenty of prompting to do so. When you install it be sure to UNTICK the free trial box.
Superantispyware
This one excels at cleaning out tracking cookies and is also a very good general malware cleaner. There are frequent updates, with the free version you should download them preferably before you run it, but you get plenty of prompting to do so. Of course, choose the free version !
Malwarebytes Anti-Exploit
This stays running on the system all the time, and supplements your Anti-Virus in keeping out harmful stuff.
Adwcleaner
Probably the best Malware remover available. The free version runs on demand. There are frequent updates, with the free version you should download them preferably before you run it, but you get plenty of prompting to do so. When you install it be sure to UNTICK the free trial box.
Junkware Removal Tool
This is in a similar vein to ADWCleaner but should be run in addition. It's been recently acquired by Malwarebytes, so should probably be considered a a good, useful tool on that basis alone.
To read PDF files download the free reader by clicking the button.