Windows 8.1 is an update for Windows 8 and the code base of both operating systems is same, so its quite obvious that you face the same problems and issues while installing or upgrading to Windows 8.1 which were faced by many people at the time of Windows 8 installation.
I have received a few emails from various Ask VG readers who are facing issues while installing Windows 8.1 and those issues are same as issues faced in Windows 8 installation.
There were a few updates pending for download/install in those Windows 8 computers which was causing this error message.
So if you are also facing this problem, the solution is: Open Windows Update and check for new updates.
But some people are unable to see Windows 8.1 update in Windows 8 Store.
If you are facing this problem, check out following tutorial to fix it: Sometimes when you try to download Windows 8.1 through Windows 8 Store, you receive error message that something happened and your Windows 8.1 install can't be completed.
The Windows 10 upgrade is free, but sometimes the installation can fail.
If you’re having problems getting the upgrade to take, here are a few reasons why the upgrade failed, and what you can do for a successful upgrade.
It seems there are some important updates which are required by Windows 8.1 downloader and if it finds those updates missing in a computer, it shows the error message.
A RAW filesystem simply means that it is a filesystem that is not recognized by Windows. DATA AND CALCULATE VALUES AND TOLERANCES DIFFERENTLY. When this is the case Test Disk will stop at this point and ask you to fix it before it finishes writing the new partition table.
Therefore all the available filesystem drivers are unable to mount the filesystem as a drive. If the backup boot sector is good (as in this case) simply choose BACKUP BS and press enter.
Disconnect non-essential devices attached to your computer.
If you have non-essential external devices (printer, scanner, etc.) connected to your computer during installation, these can interfere with the setup engine and prevent the installation from completing because Windows 10 is trying to detect and install them.