The dv series with that cpu are well known to start doing that lockup and this one day will just not start. Here's TWO links about it and you can find thousands more.
1. Cnet to the rescue -> http://forums.cnet.com/5208-19683_102-0.html?threadID=385633&tag=forums06;forum-threads
2. Another member that is pleading for any other solution or issue -> http://forums.cnet.com/5208-6122_102-0.html?threadID=389309&tag=forums06;forum-threads
Again, I feel for you but this model line is well known for these issues. Take the early warning to get your files out to a safe place before you can't.
Also check to see if HP is offering any extended repairs at http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01087277&lc=en&cc=us
I have a problem with the computer freezing. Usually have to do a hard shutdown to get out of it. Sometimes I get a box that says the following: Logon Process Has Failed To Create The Security Options Dialog. There is a Red X- Security Options and a box that says OK.
I have no idea what the warning means. I have AVG as my anti-virus and Windows Defender. Did a scan with both programs and found nothing. Desktop is a HP Pavilion running an AMD Athlon 64X2 dual core 4600 with 3 Gigs of Ram and Windows Vista Home Premium SP2. I have not added any new devices or software and the computer has been normal for the past 2 years. Sometimes it runs fine for a week and then it acts up and starts to freeze. System scans show nothing unusual.