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Don’t panic. Your PC isn’t broken. This is one of the most common—and easily fixable—driver issues on older Intel chipset-based motherboards.
If you’ve recently reinstalled Windows on a classic Dell OptiPlex 755 (a workhorse from the late 2000s), you’ve likely encountered a frustrating sight in Device Manager : a glaring yellow exclamation mark next to "SM Bus Controller."
Don’t panic. Your PC isn’t broken. This is one of the most common—and easily fixable—driver issues on older Intel chipset-based motherboards.
If you’ve recently reinstalled Windows on a classic Dell OptiPlex 755 (a workhorse from the late 2000s), you’ve likely encountered a frustrating sight in Device Manager : a glaring yellow exclamation mark next to "SM Bus Controller."