A popular tactic of criminals is the "fake order" scam. The way it works is that you get a message, usually in email or text, that appears to be a routine confirmation for an order. Of course, you never ordered whatever product or service it's confirming. The message looks common enough, and it says that money will be charged to your credit card or withdrawn from your bank account for the ...

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

Learn more about account-related offences that may occur on the Xbox network.

更详细地了解通知你关于 Xbox 强制措施的不同方式以及你可以在哪里获取相关详细信息。

Add your Google account to the app On the Google account security page, go to the Add more second steps to verify it's you section, choose the Set up from the Authenticator app section. On the Get codes from Authenticator page, select either Android or iPhone based on your phone type, and then select Next.

Use your Microsoft account to sign in to Microsoft services like Windows, Microsoft 365, OneDrive, Skype, Outlook, and Xbox Live.

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. There are two methods to which you can activate your product: Online via the internet, and by using the Product Activation Portal. Online: When you begin activation, Windows will try to use your internet connection to activate online. If you have ...

Learn how to sign in to Office or Microsoft 365 from a desktop application or your web browser.

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...