My experiences while installing windows 8 pro upgrade (clean install). I decided to upgrade laptop to windows 8.. and do a clean upgrade that means booting from dvd/usb choosing advanced then formating/deleting partitions with previous windows and instaling windows 8. first i created usb bootable with upgrade wizard.
everything goes smooth file copy and then messege to remove usb drive and restart pc pop up i remove usb click ok pc restarst .. windows boots says preparing hardware.. and then blue sceens
quite fast to see the new blue scren i would say. then PC reboots, and error comes out saying you will need to do all the install over again because system crashed.. i did it one more time same result.
then i decided to try other things in email you get after you buy pgrade you get dowload link for windows 8.. i donwloaded it from other pc and choose to create iso image then made bootable usb stick with windows 7 usb dvd download tool.
But thats not all i decided to see if there is new version of bios for my laptop and there was one so i upgraded my bios.
then booted from usb that was created from iso everything went fine.. did clean install formating my HDD so no remains of previous os was left.
im not sure what helped BIOS upgrade or recreating usb media.
Blue sceen error was irql not less or equal. I think it was bios upgrade that helped.
