@IvEy98 Make sure you have an archiver application installed such as 7-zip or WinRAR. If when you download a file you still see a Notepad icon on the file, right-click the file, click 'Open With', then click 7-zip or WinRAR if it's in the list otherwise click 'Browse for an application' and select 7-zip's or WinRAR's executable file (something like C:\Program Files\7-zip\7zfm.exe or C:\Program Files\WinRAR\winrar.exe).
If you need more help please give us details of what you've tried and where you're stuck.

@eshenk If you have nothing nice or useful to say, don't say anything.