Blue Screen Of Death

I've just rebooted my computer after cleaning and de-fragging the registry using Uni Blue Registry booster.
I usually do this once a week, on the reboot I got the BSoD screen with the error "bad pool header"

unfortunately I didn't take down the code of the error...

Any help on what to do with this.. Really don't want to loose any data.

Regards

Hello,

This is probably caused by the register cleaner you used. It might have deleted an important registry key required for Windows to operate properly. You can try system restore to fix this issue.

Yes...This did fix it...Just thought it was strange as it's never happened before.

Regards