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Use the System File Checker tool to repair missing or corrupted system ...
If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.
Using System File Checker in Windows - Microsoft Support
Learn how to run System File Checker in Windows to check if your computer has problems with files.
Description of Microsoft System Information (Msinfo32.exe) Tool
Windows includes a tool called Microsoft System Information (Msinfo32.exe). This tool gathers information about your computer and displays a comprehensive view of your hardware, system components, and software environment, which you can use to diagnose computer issues.
Scan a document or picture - Microsoft Support
The Windows Scan app can help you scan pictures or documents and save them to your PC as JPEG, bitmap, or PNG files. For more info, see Install and use a scanner in Windows. Get Windows Scan. Use your scanner and download an app from Microsoft Store to scan a document or picture to your PC.
Repair a corrupted workbook - Microsoft Support
Click File > Open. Click the location and folder that contains the corrupted workbook. In the Open dialog box, select the corrupted workbook. Click the arrow next to the Open button, and then click Open and Repair. To recover as much of the workbook data as possible, pick Repair.
Applies To: Excel for Microsoft 365, Excel 2021, Excel 2019, Excel 2016
Repair Outlook Data Files (.pst and .ost) - Microsoft Support
If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.
Applies To: Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
View, print, and edit PDFs in a PDF reader - Microsoft Support
You can use this PDF reader to view your PDF, with no need for an additional viewer application on your computer. Note: You can view and print the PDF in the reader, but you cannot edit its contents.
Applies To: OneDrive (work or school), OneDrive (home or personal)
Perform an offline system update | Xbox Support
Plug your USB flash drive into a USB port on your computer. Open the Offline System Update file OSU1. OSU1. Click Save to save the console update.zip file to your computer. Unzip the file by right-clicking on the file and selecting Extract all from the pop-up menu.
How to start a scan for viruses or malware in Microsoft Defender
You can start a scan for malware any time you like. Note: Microsoft Defender currently offers anti-malware on Windows, Android, and macOS. From the Microsoft Defender dashboard. If you want a deeper scan, instead of selecting Quick scan in step 3, select Scan options and choose the type of scan you want.
Applies To: Microsoft Defender on Android, Microsoft Defender on Mac, Microsoft Defender on Windows
Use a fix-it tool with Windows 10 - Microsoft Support
Select Start > Settings > Update & Security > Troubleshoot > Additional troubleshooters , or select the Find troubleshooters shortcut at the end of this topic, and then select Additional troubleshooters. Select the type of troubleshooting you want to do, then select Run the troubleshooter.