I wrote and maintain WM apps.
And in the cupboard we have some iPaqs. There are no updates for those and they work fine as delivered albeit it you may find a new owner thinking like this is some new laptop with Windows and you need to run Windows Update.
That's not how these things work.
Setup of the WiFi connection is not well documented so be sure to set the router to what is supported.
http://h18000.www1.hp.com/products/quickspecs/productbulletin.html#spectype=north_america&type=html&docid=11982 lists WEP and WPA but not WPA2.
Some folk don't get the message so I'll repeat it. There are no updates.
http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?lang=en&cc=us&contentType=SupportManual&prodTypeId=215348&prodSeriesId=420534 has a paper about use on wireless LANs.