Final answer:
Some applications might not run properly with standard user credentials under UAC because they require administrative privileges to access certain system files or settings. Running such applications often requires elevating permissions through the 'Run as Administrator' option.
Step-by-step explanation:
User Account Control (UAC) is a security feature of Windows that helps prevent unauthorized changes to the operating system. Standard user credentials usually have limited permissions to protect the system against harmful changes. Some applications may not run properly under standard user accounts because they require access to system files or settings that are protected by UAC.
Applications designed for an older version of Windows or those that require administrative privileges often run into issues with UAC. When such an application tries to perform a task that is outside the permissions of a standard user account, UAC blocks the action, leading to potential malfunctions in the application.
For these applications to run properly, they may need to be started with 'Run as Administrator' option, which prompts for administrative credentials. If the user has those credentials and provides them, UAC will grant the application the necessary permissions to function correctly.