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Windows Server Update Services vs ABC-Update: catalog facts
Windows Server Update Services	ABC-Update
Free Included as a role in Windows Server at no extra cost.	Free Freeware, also free for commercial use.
Windows, Self-hosted	Windows, Command line
Built into Windows Server Central control over which Microsoft updates reach clients	Schedules updates and reboots outside working hours Reports missing updates and pending reboots
Deprecated, with no new features planned Requires a Windows Server installation	Windows only Focused on Microsoft updates rather than third-party software
Self-hosted	Downloadable app
Closed source	Closed source
License not stated	License: Freeware
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.