what is this error and how do i fix it

hi

thanks for the tips. unfortunately they did not work for my desktop.

i then downloaded Windows 10 (successfully) from the microsoft site but that too did not work. it completed the installation and finally came out with a message that "Windows 10 installation has failed".

the next attempt to update Windows gave error 0x8007042b.

not sure how to fix the issue.

Girish Tatke

My name is Kenneth. I am an Independent Advisor and fellow consumer of Microsoft products, I will be more than happy to help you. I’m sorry to hear that you are having trouble. Troubleshooting windows updates errors can be resolved by resetting some update components in most cases...others will require a clean install. There a a few methods below to try:

The update error 0x800700c1 occurs when your system downloads the required update files but fails to install them. There is likely corrupted data in the update files, or the Windows services that help in this installation are not running.

What Causes Error 0x800700c1

Here are some of the causes for your system failing to install update files:

Network connection issues

Corrupted or missing system files

Update installation services failing to start

Improper shutdown

Improper installation of software or updates

Malware infection

Step 1:

Check Internet Connection for Connect Issues & Check for Malware

Click Windows Security-Triple Lines-Virus&Threat Protection-Scan Options undercurrent threats-Full Scan

Step 2:

Run Windows Update Troubleshooter

Windows Key + I

Select Update & Security

Select Troubleshooter

If you see Windows Update Troubleshooter<select> if not select Additional troubleshooters click on Windows Update

Hit Run Troubleshooter

Step 3:

Repair Corrupt File System

In Search Type CMD Paste or Type

dism /online /cleanup-image /restorehealth

sfc /scannow

Reboot

Step 4:

If error persists boot in Safe Mode

https://support.microsoft.com/en-us/windows/sta...

Press the Windows logo key + R.

Type msconfig in the Open box and then select OK.

Select the Boot tab.

Under Boot options, clear the Safe bootcheckbox.

Then run DISM and SFC dism /online /cleanup-image /restorehealth

sfc /scannow

Step 5:

Reset Window Update Services:

Click on Wifi Icon Select Airplane Mode

In Search box type CMD Enter Following command and press enter after each to execute

net stop bits

net stop wuauserv

net stop cryptsvc

net stop msiserver

net stop appidsvc

del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat"

ren C:\Windows\SoftwareDistribution SoftwareDistribution.bak

ren C:\Windows\System32\catroot2 catroot2.bak

regsvr32 /s wuapi.dll

regsvr32 /s wuaueng.dll

regsvr32 /s wucltui.dll

netsh winsock reset

net start bits

net start wuauserv

net start appidsvc

net start cryptsvc

net start msiserver

Last Method: Microsoft Software OS downloads for fresh installs

https://www.microsoft.com/en-us/software-download/

I hope this helps, please feel free to reply to this if you need any further Assistance.

Kindly,

Kenneth

Disclaimer: Please note, this is a peer-to-peer support forum meaning I'm just a fellow regular MS Team forum user like you who are trying to help other MS Team forum users with their MS Team issue. So in this case, I'm Non-Microsoft Staff I don't have access to your account nor I'm authorized to do so.