Installing the RST drivers are not required unless you have the RST feature enabled in the BIOS. They are only needed if you have a RAID volume configured, or have RST enabled.
You can verify by going into the BIOS, clicking Advanced, Devices, then SATA. If it shows AHCI, you are not required to have the RST drivers installed.
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If you have your system set to AHCI mode you will not need the IRST, the software is for monitoring and managing RAID configuration, if you are having problem with this software you can uninstall it and that will not be any problem.
If you still want to have it installed make sure you have the latest BIOS version and the latest IRST installed.
Please check F7 BIOS Update Instructions for Intel® NUC