Lord Gaben

Open Windows update and then open the update log, look at the details of the fail updates and just google the update name and error code and there might be some info online about the update failing. If that doesn't work I would try these options Navigate to "C:\Windows\SoftwareDistribution\Download" and delete all the contents of the folder. Open CMD as admin, and run "sfc -scannow" Clean install Windows 10

Have you tried repairing your Windows install off Windows installation media?

Yes, if don't already have a preference on C++ or C# IDE's then I can highly recommend Visual Studio

navigate to, "C:\Program Files (x86)\Steam\steamapps\common" 64-bit Windows "C:\Program Files\Steam\steamapps\common" 32-Bit Windows "~/Library/Application Support/Steam/steamapps/common" OS X "~/.Steam/steamapps/common" Linux Then delete the contents of the folder

There is nothing wrong with sleep mode, I use it every night

I haven't had many issues with Windows 10, I had a problem with sleep functionality on my main PC, but that was fixed with a GPU driver update. Other than that I have had no issues on any other machines I have upgraded, but I see numerous posts on this forum about Windows 10 problems, I would wait a few months if it really matters to you that stability is 99.99% guaranteed

boot into the Window installation media, create the Windows partition (Windows will create any other system partitions needed on the same disk) on the boot disk and don't touch your HDD, simple.

I would never recommend selling HDD's because there is always the chance of data recovery, say that secure wipe didn't wipe all sectors accidentally. If you still want to sell it with the HDD I would secure wipe it, then reinstall Windows. I personally though would take out the HDD and sell it with out one or put a new HDD in it.

Make sure the card is sitting firmly in the PCI-E slot and the PCI power is plugged in properly. I would reset any overclock you have on the card and if that doesn't work I would RMA the card.

graphics cards don't use 1200W

you mean mV not MV, MV is mega volts, I'm pretty sure a standard wall outlet is not capable of that voltage

I would try updating the WiFi cards drivers

Try this Update your motherboard's firmware Clear the CMOS If that doesn't help I would try this Install Windows 8.1, a few people are having issues with Windows 10 I would do this before declaring the GPU faulty

Does your motherboard have an LED debug code?

I'd try reinstalling Steam