Resource center
Microsoft software resources
Official ISO downloads, product-key format references, deactivation walkthroughs and an activation-error lookup table.
Everything below points to a Microsoft-hosted file, a Microsoft Learn article, or a reproducible PowerShell command. We do not host installers, cracks or pre-activated images — only the original sources, indexed and explained.
Official Microsoft ISO downloads
Every link below points to a Microsoft-hosted ISO or Media Creation Tool. We don't host installers — only the keys.
Product key format reference
Every Microsoft product key is 25 characters in 5 groups. Here's how to tell what you've got.
Deactivate and transfer a Microsoft license
Retail keys move freely between machines as long as you deactivate the old PC first. OEM keys can't be transferred.
Activation troubleshooting reference
The 12 errors that account for 90% of support tickets — and the one-line fix for each.
Our sourcing policy
We refresh every link the first Monday of each month and remove any URL that has redirected to a marketing page. Tables and PowerShell snippets are re-tested on a clean Windows 11 24H2 build with the latest cumulative update before publishing.