The Intel IG451 Windows driver appears to refer to a graphics driver or a chipset driver for Intel's integrated graphics. However, as of my latest knowledge, there's no exact reference to "IG451" as a widely recognized or specific Intel product name. It's possible that the name is a typo or abbreviation, and you may be referring to something like Intel HD Graphics (e.g., Intel HD 4000, Intel UHD, or similar integrated graphics) or the Intel Graphics Driver for a certain chipset series.
Regardless, if you're dealing with an Intel integrated graphics driver or a chipset driver, here's how to go about installing or updating the driver on a Windows system: