In most cases po KMS tools (Ratiborus) work, and you can bypass "windows is not genuine" easily. Sa mga OEM medyo case-to-case basis din at may tatanggaling Windows updates, rearm SLMNGR at kung ano pa to remove that annoying text. Pero in reality ay full version na yung gamit mo. Di mo lang ma-customize yung desktop/theme, black screen...or some other reduced-functionality-mode. Basta nag-update normally ang Windows using KMS Tools, ok na yan. Nasa inyo na yung initiative to find the fix for this nuisance. Free naman yan sa net using - "windows is not genuine" fix.