iaantmon.exe is a process that belongs to the Intel Application Accelerator software. The Intel Application Accelerator is a software package that replaces the ATA drivers that come with Windows with drivers optimized for desktop PCs using select Intel chipsets.
The process is important for the correct functioning of your computer so it is not to be removed.
Non-system processes like iaantmon.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues