Win8.1 Update failed to do

To solve the problem that windows8.1 update can not be started, in fact, just use Win8.1 installation image + emergency command to fix, for example, the most classic sfc /scannow command. This fix command scans the integrity of all protected system files while replacing corrupted or anomalous version files with the correct Microsoft version.

Specific steps:

1. Download Win8.1 system image, burn DVD installation CD or make U disk boot tool;

After downloading ISO, you can use Rubik's cube computer The Rubik's Cube file check in the master to get the SHA1, MD5, CRC and other check values, to ensure that the download is the official pure version, do not give the Trojan virus a chance

• Rubik's cube master Rubik's cube U disk boot You can make the ISO into a bootable U disk for installation, which saves you the trouble of engraving, and can be shared with your friends.

• Rubik's Cube in Rubik's Cube Master can burn ISO to DVD CD-ROM, you can directly run the installation

2, insert the Win8.1 DVD installation CD or U disk, turn on the computer power, set the BIOS boot items, use the installation CD /U disk to start;
▲ when appears After the prompt, quickly tap any button

3. When the Win8.1 installation interface appears, use the key combination Shift + F10 to open the command window;

4. Enter Notepad in the command window. (Notepad), open the Notepad function;

5, use The file open function of the matter, select “ this computer & rdquo;, view the local disk partition situation;

Since Vista /Win7, Microsoft Windows system introduced the system to retain the partition, the main storage startup file; the system primary partition (The system disk that everyone often says) mainly stores all system files of Windows. Ordinary users purchase new computers pre-installed with Win8. Local disks generally include partitions such as system reservations and system disks.

Advanced users generally merge system reservations into the system primary partition to generate a single partition.

6. For these two disk partitioning methods, we need to take different repair commands:

• Separate system reserved partitions

Then close Notepad and return commands. In the window, enter the following command to complete the repair.

sfc /scannow /offbootdir=C: /offwindir=D:Windows

• The system keeps merged to the primary partition

Then close the notepad and return to the command window. Enter the following command to complete the repair.

sfc /scannow /offbootdir=C: /offwindir=C:Windows

After waiting for the system to complete the self-test and repair work, Win8/Win8.1 users can start the system normally.