Error codes

0x800705B4

Operation timed out

What it means

An update or Defender scan took too long and Windows gave up.

Common causes

• A slow or interrupted connection
• Another antivirus interfering with Defender

How to fix it

1. Restart and try again on a stable connection.
2. Uninstall other antivirus software so only one is active.
3. Run the Windows Update troubleshooter: Settings > System > Troubleshoot > Other troubleshooters > Windows Update.
4. Reset the update cache: in Terminal (Admin) run net stop wuauserv, net stop bits, rename C:\Windows\SoftwareDistribution to SoftwareDistribution.old, then net start wuauserv and net start bits.