I upgraded on last saturday, activate it online and immediately "refresh this pc". Haven't have any problems. Just the hassle of re-installing drivers and most used programs. But it was worth it. Thumbs up!

I refresh my pc and removed everything. My drivers were removed as well, hence, I downloaded most of my drivers again. To be frank, this is the best method to have Windows 10 error free or, by reformatting/fresh install.

Basically, you need to know the hardwares that are inside your rig. In my case, the most important drivers are Catalyst 15.7.1 for my ARES III gpu, drivers for my MOBO the Maximus VII Formula, Mouse and Keyboard from Mad Catz, and finally for the sound card the Xonar Phoebus Solo. All the others are automatically updated through Windows update. Though I did lose all of my Win 8.1 Desktop Theme modifications...

Are using Desktop or Laptop, may I ask?

To Kernkraft400;

I share your pain brother, last friday it took approximately 12 hours on my Streamyx
1MB connection to finish downloading the iso for Windows 10. During that time, I spent it watching a marathon of ONE HD Korean Dramas to pass the time... Hopefully it won't be the same in your case. Our net connection in my area is very slow like, s**t slow. But hang in there! Once your pc is upgraded, all that waiting will be well worth it

To delsoo;

I really dont know why it is so slow in my area. But all is well so I dont complain that much. Did you guys know that DX12 can combine an integrated gpu and a discrete one? Hell yeah for Windows 10!!

Well this is c**p! My younger brother's pc's motherboard failed after successfully activating Windows 10. LUCKILY I have a spare motherboard to use. UNLUCKILY the license of the Windows 10 was tied to the broken motherboard... hence, I can no longer activate Windows 10 on my younger brother's pc. Do we have to get the same motherboard again to re-activate Windows 10? Or all is lost and time to revert to trusty old 8.1?