Try www.filehippo.com
It is a site that has shareware, freeware, opensource, and trial software. Each type is categorize, a description is provided, the site informs you if the software has adware in it and what to do.
I have been using it for about 2 years - this is where I found the AVG software the previous posters spoke about - you also need to look into a spyware program as well such as spybot. Running AVG and spybot and doing regular check on your system should make your life a lot easier and your computer the better for it.
