Verified answer

http://www.winzip.com/index.htm

7 zip is probably the best becasue its has support for many files and its open source.

There are many other programs that can open zip files.

google zip extracting programs for other ones

If ya got Win XP it's built in, otherwise www.winzip.com

If's free if ya forget to pay . . .

Try one called justzipit....just google that and you'll find it..easy to use too

Try winrar which you can download from cnet.com