Sunday, September 20, 2015

Pentium G3258 and Windows 10

I've just built a basic gaming system with one of my favourite CPUs the Intel Pentium G3258.  I'd already loaded Windows 7 on it but wanted to upgrade to Windows 10. Every time and every which way I tried it failed to install giving the error 0xC1900191-0x20017 The installation failed in the SAFE_OS phase with an error during the BOOT operation.

Further investigation revealed it was something to do with Windows Update KB3064209 and file C:\Windows\system32\mcupdate_genuineintel.dll. However all the fixes suggested didn't work. Then on www.reddit.com (a site I don't normally use for technical support) there was a post about the Intel Pentium G3258 CPU in particular having this problem. It was suggested to disable one core of the processor in the UEFI BIOS, then do the install and then delete or rename the mcupdate_genuineintel.dll file. This did work and the system is fine running Windows 10 as you can see. I trust that Microsoft will patch this strange bug in the not too distant future.