Windows 8.1 install stuck on Windows logo

[fazoo6]

Hi!
Decided to upgrade my computer to Win 8.1. Prepared bootable USB and booted from it.
All i saw, was the blue windows logo (no loading texts, circles etc, just the logo) it was stuck there for 15 minutes and i gave up. Tried couple of times again, same thing every time.
My computer should support Windows 8.1 by all means.
Just in case, specs:
Asus P5N-D Mobo
Intel Core 2 Duo E8400 running 3.15GHz
Radeon HD 6850
6Gb RAM 800MHz dual channel (2x2Gb and 2x1Gb)
1x 2.5'' 320Gb HDD (Previous OS installed here) and 1x Seagate 320Gb HDD (Blank)
Any suggestions? Could the image be bad or something went wrong with preparing the bootable? I used Windows 7 USB/DVD Download tool.
Thanks for replies!

 

[USAFRet]

Are upgrading from a previous OS, or installing fresh?

I'd suspect a bad USB or USB creation.

 

[fazoo6]

My old is Windows 7, and I'm planning on installing 8.1 over it. I'm preparing a new bootable right now.

 

[fazoo6]

Probably the USB is bad... I have another usb stick (Kingston DT Elite USB 3.0 32Gb) but when i prepare it as bootable it won't show up in bios nor boot menu.. I guess i gotta get new one or find a DVD..