When you install applications on a Windows system, you grant them permission to access various components of your device, such as the webcam or location. Regularly auditing these permissions is advisable to ensure you're not sharing more information than you're comfortable with. To check app permissions, go to Settings > Privacy & security > App permissions, where you can view and revoke access for specific permissions like Location, Camera, and Microphone. You can also check permissions on an app-by-app basis by navigating to Settings > Apps > Installed apps and selecting Advanced options for individual apps. Some apps may have Background app permissions that allow them to operate in the background, which can affect memory and battery life. Regularly uninstalling unused programs can improve system security and performance.