Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Select the steps for the version of Office you want to install or reinstall. Close the uninstall tool. Microsoft 365 | Office 2021 | Office 2019 | Office 2016. If Office still won't install, check that your computer meets the system requirements to install Office.

Go to microsoft365.com and sign in with your Microsoft 365 account. Select Install apps. Follow the instructions in the browser to download the installer and start your installation.

On the Developer tab, in the XML group, click Expansion Packs. Click Add. In the Install XML Expansion Packs dialog box, find the location of the manifest for the solution that you want to add. Click Open. In the Available XML expansion packs list, click the solution that you want to attach to your document, and then click Attach.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs. It also fixes corrupted registry keys. First, you'll need to download the troubleshooter. Download troubleshooter.

Open a document after a file corruption error. Excel for Microsoft 365 Word for Microsoft 365 More... Sometimes a file can be damaged in such a way that Word, Excel, or PowerPoint can't open it normally. But all is not lost. The Open and Repair command might be able to recover your file.

On the Developer tab, in the XML group, click Expansion Packs. Click Add. In the Install XML Expansion Packs dialog box, find the location of the manifest for the solution that you want to add. Click Open. In the Available XML expansion packs list, click the solution that you want to attach to your document, and then click Attach.

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components.

KB2510668 - You can now use Package Installation Wizard (Dtsinstall.exe) to run the deployment manifest file of an SSIS package when SSIS 2008 or SSIS 2008 R2 is not installed - Microsoft Support.

You can use installation media (a USB flash drive or DVD) to install a new copy of Windows, perform a clean installation, or reinstall Windows. To create installation media, go to the software download website , where you'll find step-by-step instructions.