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  1.    18 Nov 2015 #11
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,129
    Win 10 Pro (1703)

    Quote Originally Posted by Steve C View Post
    I do have a full Macrium backup of my current 8.1 installation. The current installation problem just drops me back to Windows 8.1, Windows is still activated and I can easily delete the install files via Disk Cleanup.
    Excellent.. wise man!
    - so I suggest you look carefully at your installed programs and see if you see anything that might hook onto the Windows UI or modify it in any way, and uninstall that and your AV/firewall and try again.

    Have you tried running a compatibility check?
    Will your PC run Windows 10? Use the official compatibility checker to find out | ZDNet
      My ComputerSystem Spec
  2.    18 Nov 2015 #12
    Join Date : Sep 2015
    Posts : 2,371
    Windows 10 Pro 64-bit 1706 (CU build 15063.674)

    OK, then uninstall or completely disable your antivirus, firewall, antispyware, any disk utility (Macrium, Acronis etc). Then go at Device Manager and disable any non-important device (audio, SATA/SCSI controller without devices attached, TV tuner etc). This will prevent any hardware incompatibilities (if Windows Update cannot find drivers for a device, installation stucks at some point). Also press Win+R to open a Run dialog and execute msconfig. Go to Services tab, check the box to hide all Microsoft services and then disable most non-important services (updaters etc). Then click on Startup tab and click to open Task Manager. Again disable any non-important application (QTtask, Skype, Java etc). This will prevent any software incompatibilities. Open the Windows 10 ISO or DVD, right-click on Setup and Run as Administrator (just in case). Now you should succeed.

    PS: It is a good idea to execute a check disk to eliminate any disk errors before starting:
    chkdsk c: /f
      My ComputerSystem Spec

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