You downloaded the 64-bit driver for a 32-bit OS, or vice versa. Solution: Check your Windows version (Settings > System > About). Download the correct architecture. The OptiPlex 755 supports both, but the SM Bus driver is architecture-specific.
If the Dell website is slow or you cannot find your legacy file, use Intel’s official tool: download dell optiplex 755 sm bus controller driver
The Intel tool only works on Windows 7 or newer. For Windows XP, use Method 1. You downloaded the 64-bit driver for a 32-bit
, and point it to the folder where you extracted the chipset files. Why This Matters use Method 1.
Click , run the .exe file, and follow the on-screen prompts to complete the installation. Alternative Manual Installation