Common causes
Corrupt update files, low free storage, unstable internet, third-party drivers, incorrect date/time settings and damaged Windows components can prevent updates from installing.
Windows maintenance
Why is Windows Update
failing or stuck?
An update that repeatedly fails is often a symptom of storage, network, driver or Windows-component problems rather than something solved by clicking Retry forever.
Safe first checks
Restart the PC, confirm the internet connection is stable, make sure there is enough free storage, and run the built-in Windows Update troubleshooter. Back up important files before deeper repair work.
When ADA Tech should repair it
If updates repeatedly fail with the same code, Windows becomes unstable, the machine loops during startup, or system files appear damaged, ADA Tech can diagnose the underlying Windows issue and recommend repair or reinstall only when justified.