Hi - firstly apologies if I come across completely clueless as I have little idea of how the various activators work! I'm using Daz's Windows 7 Loader (1.77 repacked) for Windows 7 Ultimate RTM 7600 and it works just fine. Because my PC (Rock Xtreme CTX Pro laptop) is not listed in the SLIC/certificate/serial section I simply left it on the default options (Acer) and installed for that. I've never had a problem with activation - it works just fine! The problem I have is with sleep or hibernate. I can sleep/hibernate fine *once*. When I get it to sleep/hibernate a second time, all appears to be up and running except the display is blank - nothing will activate it and I have to reboot. Most the time (but not always) I get a couple of warnings in the Windows error logs - one for each core. It's eventid 37. This is the only possible error/warning I see. "The speed of processor 1 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 0 seconds since the last report." Could the sleep problem be being caused by some sort of ACPI corruption caused by the loader? Could it be related to me not installing the SLIC info for the correct BIOS? (It's a Phoenix Trustedcore NB as used on the Xtreme CTX PRO, Clevo M570U and several other brands). I've updated all drivers (chipset, BIOS, graphics card etc.) and nothing fixes it. Problem occurs in safe mode and Clean Boot, and with many different versions of the graphics card driver (Geforce GO 7950GTX) which I know have been fine in the past when I ran Vista. System was previously running legit Vista and I had no problems with it. Power management settings are all sensible. I'm really inclined to think it's a Win 7 issue but just posting in case there's any possibility the loader could be at fault.