Before you begin
Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.
Work through these checks
0 of 3 complete01Reset WinHTTP proxy configurations to ensure direct internet access.
- Reset WinHTTP proxy configurations to ensure direct internet access.
What to expect
Check whether the original symptom still occurs.
If it does not helpContinue only if this check applies to your device. Consult its manufacturer if you are unsure.
02Add Windows Update server domains to your firewall's whitelist/allowlist.
- Add Windows Update server domains to your firewall's whitelist/allowlist.
What to expect
Check whether the original symptom still occurs.
If it does not helpContinue only if this check applies to your device. Consult its manufacturer if you are unsure.
03Flush DNS and reset the network stack protocols.
- Flush DNS and reset the network stack protocols.
What to expect
Check whether the original symptom still occurs.
If it does not helpContinue only if this check applies to your device. Consult its manufacturer if you are unsure.
Possible causes
- Firewall or third-party internet security suites blocking the Windows Update application package.
- Stale DNS cache or incorrect proxy configurations directing traffic to invalid gateways.
- Temporary internet connection instability or ISP-level blockages of Microsoft servers.
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