Use software like 7-zip to extract those iso file, you will then get the exe setup file

why need rufu ? the Windows ISO itself is a bootable file right ?

error to setup cannot upgrade 

From my experience, the upgrade install (even if you select "Keep nothing") can still be a bit buggy, with user profile corruption etc. Best is to completely clean install, booting from the ISO, after the first upgrade.

yes same problem
i click setup.exe then i click install then get error
same problem i saw people click install got error like that

Do you guys get assigned with generic product key or specific keys after upgrading to Windows 10?

The generic key for Windows 10 Pro would be VK7JG-NPHTM-C97JM-9MPGT-3V66T which is the same key used by Windows Insider Program.

You can check using ProduKey by Nirsoft.

I'm getting the same key as you posted. Is it generic key or due to Win 10 is different the program doesn't able to extract the real key?

The program extracted key for Office also different from what I key in when install it.

I'm using this method How to get Windows 10 Product key getting different product key.

Is the upgrade process long if I do it from a bootabe usb ? how long will it take ?

what should i do now i cant roll back to windows 7 and stuck in windows 10 with not activate windows...

KB3074683 failed to install , download standalone offline patch still cant make it
.net3.5 framework failed too. haiz

I'm not an expert, just had the experience to perform clean win 7 installation on about 10 PC/ laptop. But sorry I think I'm too dumb I can't understand your guide.

Since C:\ partition will be formatted for a clean install, why should Win 7 or 8.1 still need to perform upgrade before format?

If the win 7 is already activated the first day I bought the laptop, isn't it consider official activation already?

That makes sense too. What about this?
- Format my current win 7 and clean install win 7,
- Install all the drivers.
- Activate genuine win 7 key, then run windows update to latest win 7 SP1.
- UPGRADE to win 10 using the win 10 iso that I downloaded using media creation tool.

I know it is double the work but logically the activation should be successful, right?

Just fresh installed my ASUS N550JK laptop with Windows 10, the windows update installed most of the drivers required automatically.
When I went looking at ASUS support page, I saw some drivers available for download for Windows 10.

I see stuffs like BSMI certification, CB certification, BIOS EC firmware, and also BIOS Flash Utility. To be honest those things sounds alien to me, I'm wondering if installing those drivers are necessary?

First upgrade failed. Removed my wifi adapter and the installation was successful. However, upon inserting my wifi adapter it wouldn't detect my home router, it only displays my neighbours routers. Then there's the resolution stuck at 1024 by 768. Not able to change to my native 1680 by 1050. My soundcard was not being detected as well. Restored back to Windows 7. Guess will play the waiting game now.

My PC specs:
Phenom II 965
16GB RAM DDR3
1GB AMD Radeon 5850
MSI 790GX Mainboard
ASUS XONAR DS
1TB WD Black
DLINK DWA 250

If you mean install driver from device manager, yeah. It kept insisting that the current driver is up to date.

For the display driver, no I didn't try that because I was struggling to get the wifi working.

Hmm apparently not only a few people encounter this problem but it seems like a lot of users are facing it.

Try this, resetting windows socket.
Press Windows key + X then select command prompt (admin)
type and enter these inputs into the console:
netsh winsock reset

Then, restart PC. Hopefully it'll work 

I uninstalled ELAN (touchpad driver ) for my laptop today . Surprisingly , I found the touchpad working as usual ? Can the touchpad function without the diver ? Actually I wanna remove the older version of Asus Smart Gesture software before installing the latest version I downloaded form the Internet. But , I accidentally remove the ELAN software.

The key you found is just a generic key if you are upgrading.  Actually you dun even need to key in the key if you clean install the second time - just skip the input key screen.

My second installation on activated Windows 10 doesn't ask for key at all during the installation.  It will just auto activated.

you sure?  I thought only changing the motherboard will require a new key.  So if you install it to new SSD, a new key should not be requested, i.e. the same activation code will be automatically used from the upgrade process.

ok, thanks for the info.  Coz Horns mentioned from his experience, changing hard disk doesn't count.    I did change my motherboard once and have to call MS helpdesk to get a new code for Windows 8 previously.