![]() ![]() Usually, this is seen after you reinstall or update the operating system (this is my situation), or roll back/ downgrade Windows. Why There Is an Exclamation Mark on Driver in Device Manager? It is integrated into most Intel chipsets. SM Bus Controller servers for low-speed, system management communications. The general purpose of it is to monitor the board’s voltage and temperature. SM Bus Controller, also called System Management Controller or SMBus Controller, is an Intel chipset on the computer motherboard. Have you ever heard of SM Bus Controller or seen such a name in your system Device Manager under Other devices section? How do you react if there is a yellow exclamation mark and a question mark (which indicates there is something wrong) located on it? Let’s see our solutions! What Is SM Bus Controller? Windows 11 Assistant Software Recommended.How to Resolve SM Bus Controller Exclamation Mark Issue?.Why There Is an Exclamation Mark on Driver in Device Manager?.
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