If running either a Windows or Mac operating system, your computer comes with its own "zip file" decoding program (like "WinZip" for Windows or "RAR Expander" for a Mac). These will decompress most file attachments, but not all. If you have a file extension your computer cannot handle, you will need to download another program (see Resource 1 or 2).
Decoding Email Attachments
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Step 1
Download, setup and install an "Expander" (see Resource 1 or 2) if your computer does not already have one. Now you can open (or "unzip") your attachment files.
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Step 2
Right-click on the attachment icon below your email heading. Scroll down and click on "Open With." Choose your compression program.
Step 3
At the pop-up screen, choose whether you'd like to "Open" or "Save" your downloaded files.
Your "decoding" or "compression" software should automatically choose a program to open your file with, once it is "expanded." If not, you may have a file that your computer is not compatible with (see Warnings 2).