Hi, I have an iMac 5.1 where I installed Mac OSX 10.5 Leopard and Windows 7 Ultimate 32-bit dual boot. I would like to be able to activate mod bios windows 7 genuine. Windows 7 Loader eXtreme Edition 3502 I get these two screens: the warning message is: MBR SLIC Loader(UnSafe) disabled: GPT detected! that means? in advanced mode these ore the information: there is no slic. how can I activate my copy of windows and install the updates? thanks