Steps to fix Error 0x80073701 When Updating Windows 10 to version 20H2, 2004, 1909 or 1903

Step 1: Uncheck proxy server for your LAN
Step 2: Disable Manual proxy setup
Step 3: Run Update Troubleshooter
Step 4: Run DISM and SFC commands
sfc /scannow
dism.exe /Online /Cleanup-image /Restorehealth
Step 5: Reset Windows Update components

net stop bits
net stop wuauserv
net stop appidsvc
net stop cryptsvc
ren %systemroot%//SoftwareDistribution SoftwareDistribution.bak
ren %systemroot%//system32//catroot2 catroot2.bak
net start bits
net start wuauserv
net start appidsvc
net start cryptsvc

Step 6: Restart Background Intelligent Transfer Service, windows update services
Step 7: Make sure .NET Framework 3.5 and 4.8 is checked
Step 8: Use Windows 10 Update assistant
Step 9: Use Media creation tool

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