You might see Error 0xC0000142 when you start an Office application. To help you resolve this, try the solutions below. We’ve listed the most common solutions first so try the steps in the order they're listed.

To resolve this issue, copy the D3dx9_25.dll file or the D3dx9_27.dll file from the disc 1 CD/DVD of the game CD/DVD pack to the corresponding game folder. To do this, follow the appropriate steps for your version of Windows:

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.

Select the Search icon on the taskbar, type xbox, and then select Xbox. In the list of installed games on the left side of the app, right-click the game you want, and then select Uninstall game. To reinstall your game, follow the steps in the “How to install a PC game” section of this page.

Use the Xbox mobile app, the Xbox Game Pass app, or the Microsoft Store on PC to remotely install games—so your games are ready when you are. Here’s how to get your console and Windows device ready for installations that you’ll be able to start from your phone or mobile device.

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

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.

Windows Update error 80070422. Manually fix this problem. If you receive Windows Update error 80070422 when you download the WinHlp32.exe update, you may have to change the Windows Update service settings, and then restart the service. To do this, follow these steps:

If you want to restore the Kernel-mode Hardware-enforced Stack Protection setting, you can resolve a driver incompatibility by checking if any updated and compatible driver is available through the Windows Update or from the driver manufacturer or developer.

PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC.