Hp pavilion dv7-4177nr boot up with black screen

I have laptop listed above. For the past 3 days I hasn't not been able to get it in. it sounds like its starting but the screen stays black. Recently installed antivirus on 01/01/2012 because I had some kind of worm/malware. Windows 7 is the OS. Cap lock light is on and "hp combo assistant" light is on constant no blinking. Don't know what to do.
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Hello - try a hard reset - first
Remove battery, AC adaptor connection and then hold down the Power button for 30 secs.
then reconnect all - see if it boots.
if that dont work - try to hit F8 after you power on, you may need to tap the key or hit the ESC key for a menu.
then try booting into safemode.
from there you can try to do a "Restore" - type restore in search box and run the MS system restore - select a date before your problem started.
I am an HP employee.
"Did my response help with your issue? If so, please give me Kudos by clicking the "Kudos" button or mark the post that solved your problem as the Accepted Solution. Thanks!"

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