Final answer:
The User Account Control (UAC) is the Windows feature that prevents apps from making changes to your system without your consent.
Step-by-step explanation:
The windows feature designed to prevent apps from making changes to your system without your consent is the User Account Control (UAC). When a software tries to make changes to your system, UAC notifies you and requires your approval before proceeding. This helps in preventing potential harmful changes by malware and unauthorized users. Options such as Windows Defender and Windows Firewall provide a security layer against viruses and network attacks respectively, while BitLocker offers full disk encryption to protect data. However, it is specifically the UAC that is responsible for system prompts that ask for user permission when changes are attempted.