Uninstall or remove apps and programs in Windows - Microsoft Support
There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled. You can try to repair a program first, if it's just not running correctly.
List of security program cleanup and uninstall tools
Provides links to the uninstall tools and directions for many security programs.
Fix problems that block programs from being installed or removed
First, you'll need to download the troubleshooter. Download troubleshooter. If you see the File Download box when you start downloading, select Run or Open. The troubleshooter provides steps for you to follow. If a program isn't listed in the uninstall options, you'll be asked for that program's product code.
Unexplained Windows or software behavior may be caused by deceptive ...
To do this, use one or all the following methods. Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.
How to troubleshoot Windows Installer errors - Microsoft Support
Insert the CD or DVD media, and then let the installation auto-start. Browse to the CD, DVD, removable media, or other location where the programs installation files are stored, and then double-click the Setup program. The setup file is typically one of the following:
Display Problems Playing Video Clips in Windows
In the Components area, scroll to and click Multimedia. Click Details. properly, and needs to be removed. Follow these steps: Clear the check box for this option, and then click OK. Click OK again to complete the removal. Add/Remove Programs. Make sure the Video Compression box contains a check mark. Click OK, then click OK again.
Update drivers through Device Manager in Windows - Microsoft Support
Download the drivers for the desired device from the device manufacturer's site. Make sure to download the correct drivers that match the version and architecture of Windows. Once downloaded, if necessary, uncompress the downloaded drivers. Make a note of where the drivers are located on the Windows device.
Use the System File Checker tool to repair missing or corrupted system ...
When critical Windows system files are missing or corrupted, your operating system may begin to malfunction. Common symptoms include Windows features not working properly, system errors, or Windows becoming unresponsive or freezing.
Transfer your files and settings to a new Windows PC - Microsoft Support
Learn how to easily copy your files and settings to a new Windows PC.
How to play MP4 files in Windows - Microsoft Support
Play MP4 files in Windows by right-clicking the file and choosing what application to open it with.