Dell Inspiron 1100 - Manual (Page 74)

74 Setting Up a Home and Office Network
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2 Click Properties.
3 From the Network Authentication drop-down menu, select Open.
Earlier versions of Dell wireless software may not contain the
drop-down menus. If you are using an earlier version, select the check
box labeled Data encryption (WEP enabled) and go to step 5.
4 From the Data encryption drop-down menu, select WEP.
5 If the wireless network does not require a network key (for example,
password), go to step 8.
6 Deselect the check box labeled The key is provided for me
automatically.