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Hi Jia Le Leong,
I understand why this is worrying, especially when Minecraft is tied to a purchase and Windows Hello keeps selecting an account you did not intend to use.
The Outlook address shown by Windows Hello may simply be another Microsoft account already saved on the computer. Its appearance does not confirm that it owns your Minecraft license, and it does not necessarily mean that the Microsoft account created with your Gmail address has been deleted.
Before changing anything in Minecraft, please try signing in to your Microsoft account from a private browser window using the Gmail address. If Microsoft still says that the account does not exist, use the Microsoft account Sign-in Helper with that address.
If the Gmail account works in the browser, check which accounts are currently signed in under Windows Settings > Accounts > Email & accounts, the Microsoft Store, the Xbox app, and the Minecraft Launcher. Sign out of the unrelated Outlook account where possible, then sign back in using the same Microsoft account that originally purchased or redeemed Minecraft.
Please also check your old purchase confirmation or Microsoft order history, as this may help identify which account actually owns the game. Avoid purchasing Minecraft again until the original account and purchase record have been confirmed.
If the Gmail address continues to be reported as nonexistent, contact Microsoft Support and explain that a previously working Microsoft account username is no longer recognized. For questions about the Minecraft purchase or game entitlement after the account has been identified, you can also contact Minecraft Support.
Please note that this is a user-to-user forum, so I cannot access account records, restore an account, or move a Minecraft license between accounts from here. However, the unexpected Outlook account and the unavailable Gmail account should be treated as two separate checks before concluding that the game has been lost. Thank you so much for your understanding.
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