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 complete01Run DISM RestoreHealth and System File Checker (SFC) to repair corrupted components.
- Run DISM RestoreHealth and System File Checker (SFC) to repair corrupted components.
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.
02Restart and rebuild the Cryptographic Services catalog directories.
- Restart and rebuild the Cryptographic Services catalog directories.
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.
03Purge the SoftwareDistribution download directory and re-initiate the update.
- Purge the SoftwareDistribution download directory and re-initiate the update.
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
- Interrupted downloads causing incomplete or corrupt file packages inside the update cache.
- Corruption inside the Cryptographic Services database files responsible for verifying file signatures.
- Third-party security software intercepting and modifying update files during download.
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