1. purchase a copy of Win 10 enterprise. Check
Asus Support Downloads for windows 10 drivers?
2. I use
Macrium Reflect Free to image my OS Drive very easy to restore and much quicker then Asus recovery. Asus recovery partition is removed during the upgrade would be useless anyway after upgrading to 10.
3. upgrade to Pro or enterprise will require you to pay for upgrade. the free upgrade period has been over for quite some time now more than a year. Still it was only good up grade same version home to home pro to pro etc.
4. Macrium Reflect, window 10 will create its own restore partition with out Asus drivers.
5. With Macrium Reflect you restore back to win 8 if you made an Image to restore. You may have activation issues since you lic will have been upgraded to 10.
6. Again Macrium Reflect you can restore an image to new or different hard drive/SSD
7. I don't have a G55 so I'll let some one else answer this question.
8. You CPU and GPU will Throttle somewhere around 100C to protect its self.
9.
Hwinfo64 will work.
G752VY-DH72 Win 10 Pro
512 GB M.2 Samsung 960 Pro
1 TB Samsung 850 pro 2.5 format
980m GTX 4 GB
32GB DDR 4 Standard RAM
Z97 PRO WiFi I7 4790K
Windows 10 Pro
Z97 -A
Windows 10 Pro