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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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 ...

To learn about digital signatures (also known as digital ID), what they can be used for, and how to use them in Word, Excel, and PowerPoint, see All about digital signatures. Create a signature line in Word or Excel (desktop) In the document or worksheet, place your pointer where you want to create a signature line. On the Insert tab, select Add a Signature Line in the Text group. In the ...

If you are having issues installing or updating Gaming Services on your PC, or if you are noticing that the Xbox app for PC is launching with missing content, you may want to download and run the Gaming Services Repair Tool for PC.

Xbox Support ... Xbox Support

Find out how to manage your Xbox subscriptions to request a refund or cancel a recurring payment.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

The compression options in Microsoft Picture Manager reduce both file size and picture dimensions based on how you intend to use the picture, such as in Web pages or e-mail messages. Select the picture you want to compress. Click the Picture Tools Format tab, and then click Compress Pictures. Do one of the following: To compress your pictures for insertion into a document, under Resolution ...

The default authentication method is to use the free Microsoft Authenticator app. If you have it installed on your mobile device, select Next and follow the prompts to add this account.

Summary The Windows Update Assistant helps you manually download and install the latest Windows feature update on a compatible PC. Feature updates introduce new capabilities and help keep your device secure. Use this tool if your device hasn’t received a feature update automatically through Windows Update. Download the Windows Update Assistant What does Windows Update Assistant do? Downloads ...

Disk Management in Windows helps you perform advanced storage tasks like initializing a new drive and extending or shrinking volumes.