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I've made a backup of the whole registry by exporting a regedit file. When i try to merge it, it says some keys are open by windows processes and such. So i guess i'd have to restore it in the boot process or before Windows is booted, but how would i do that?

I would think you could do that by performing a system repair using the console when booting to the installation CD. Type help for a list of usable commands once in the console.
Take care doing this. If Windows is running fine now why would you want to do this.
If not running fine why not perform a system restore from the start menu> help and support.

well i got a message earlier saying: Generic host win32.... something (svchost.exe) had a problem anyway. now it seems fine, but my sound is out. no sound icon in the tray on boot. i don't know why, so i thought restoring would solve it.

Just perform a system restore back to yesterday. Did you simply try rebooting? Were you online at the time?
FYI, system restore will restore the registry back to the condition it was in when the restore point was created. The registry is constantly changing anyway.

yes, but i turned off system restore a while ago for performance purpose... i know it'd be exactly what i need right now, but it's unavailable. Is there any way to use that regedit exported file with another software maybe to restore it? i've been to the recovery console and the command "cd.." didn't even work, so i couldn't do much from there.
btw, everytime i reboot, the sound is out. device manager's fine, no conflict. the sound was fine yesterday... but i made a change to the registry(i guess i should have been more careful, but i thought exporting the whole file from regedit was a good way of backing up. Thing is i never had to use it till now).

Well, it won't do you much good at the moment but I am curious what kind of performance hit you think system restore causes. The only downside to system restore that I am aware of is disk space usage. That can be controlled by monitoring and releasing it.
Do you have automatic updates enabled? I am looking for the cause of the sound loss.
If your only issue is the sound I suggest you remove the sound device from within Device Manager and reboot. Either Windows will find the device and install drivers, or you may need to manually install correct drivers. The correct drivers for your computer can be found at the HP website.

I uninstalled the intel audio controller device and rebooted. That solved the sound problem. Windows re-installed the drivers and it was fine. I think something must have gone wrong in the sound section (if there's one) of the registry. But anyways, everything seems fine now so i'll try to keep it this way :P
Thanks a lot guys!

ERUNT
The Emergency Recovery Utility NTIt's a life saver !
http://www.larshederer.homepage.t-o...
If there is any other tool to backup your
registry that is better than this LET ME KNOW
*****

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