files

Download and install winzip:

http://download.cnet.com/downloads/1,10150,0-10001-103-0-1-7,00.html?tag=srch&qt=winzip&cn=&ca=10001

files ending in .zip are zipped up files which need to be broken out into individual files. Sounds like yourfile associations need to be looked at. But installing WinZIP and answering Yes to reassociate extensions, will allow you to open the zipped file.

double click my computer, tools, folder options, file types, select zip, click change next to opens with and from the list select winzip, if winzip isnt in the list reinstall the latest version (8 i think)

good luck