Since this is the How To forum and not the discussion forums I'm going with the most common fix.
Backup your stuff and restore the machine using HP recovery method from this link:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=115&prodSeriesId=3744231&prodTypeId=321957&prodSeriesId=3744231&objectID=c01895783
If that fails, head to HP.COM and click the Chat button to ask what to do next.
Bob
Win 7, HP Pav dv7 Notebook, AMD Ultra Dual-core m600 2.4 Ghz, 4 GB ram +,32/64 bit OPS.
See above. Will not shut down either. I must remove/insert battery to start.

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