Kernel Data Inpage error

i encountered the"Blue screen of death"on my laptop before.(last year).However i sent it on a computer expert to repair it.Luckily,it got fixed:D
Last Thursday,it happend to me again!It says "kernel data inpage error"like before.
Then i tried running Uniblue's Registry Booster,and it didnt happened anymore.I think it got fixed.Iam just curious,Whats the cause of this Problem?Hmm
Maybe because i used to Hibernate and log-off only my laptop rather than shutting it down?

The most basic description I can give is this:
A page of kernel data was not found in the pagefile and could not be read into memory. This might be due to incompatible disk or controller drivers, firmware, or hardware.
Also here's the MSDN reference page for a more defined and technical definition