Good afternoon Poissionnariat and welcome
I think I understand what you are talking about.
The average time to the windows desktop is about 1+ min that part is not unusual.
Thing to check that may help you
#1... Check to see what is starting up and UN-check all unnecessary items. "MSCONFIG" do not turn of items like AVC suite / Firewall etc
#2... Check in the BIOS for the boot up options so the HD is the first boot device.
#3... Window updates will some times slow the boot up times.
#4... All drivers that are installed are 64bit. Install the chipset drivers from the MoBo manufacture and not using the W7 gen ones.
Hope this helps you and if we can help you any more please let us know, Mike