I had upgraded windows 7 home edition to windows 8 Pro. (32 bit).  After crash (strange metallic noises immediately after start-up) i have recovered w7 from the CD delivered with the laptop and installed all updates.  Laptop works fine again!! Trying to reinstall w8 by using http://windows.microsoft.com/is-is/windows-8/upgrade-product-key-only fails after approx. 66% is installed. Any recommendation?

Hi,

I would like to confirm which part you get 66%:expanding, installing features or updates?

or Getting device ready page:

If the second one, I consider the incompatible device or driver issue, have you used the upgrade assistance to check the compatibility?

Upgrade Assistant: FAQ
http://windows.microsoft.com/en-in/windows-8/upgrade-assistant-download-online-faq