I never put the PC to sleep if you mean the energy saving option. I thought the hibernation is used for notebooks only (for low leveled battery power?). But Windows does the page filing for these modes anyway, even though I did turn the sleeping mode off and I'm not on a Notebook? If I understand you correctly the only thing I have to do is to change the page file size in Win7? Where is the option hidden? I will give it a try on my other HDD.