If you have a Broadcom wireless card, then you must install broadcom-wl from rpmfusion repo (non-free).
See this post
I guess you can just follow the below link for fixing your wireless. It complains about the same model of HP box you are using (it should have Broadcom wireless card , BCM4322). Here is the link.
Asked: 2011-11-27 13:09:57 -0600
Seen: 571 times
Last updated: Nov 30 '11
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Can you please post the output of: $ lspci | egrep -i network This will tell us what hardware your system uses for wireless. We can then tell you how to proceed.