Depending on the motherboard maker, model and age for Win10 the most essential drivers are called Chipset drivers. You may also have them separated to several other Intel drivers and utilities. The Asrock app may do a decent job but since your system already is a few years old, AsRock may not have updated the drivers to the latest ones. Some manufacturers even leave the drivers to be updated by Windows, in which case you should go through the Device Manager item by item and manually check for updates for each (right click-update driver). If Windows can find a newer one it will update it. I've found most of the updateable drivers under the System Devices using this method but often also under other titles so starting from the first one is not overkill. It's not the way I'd like to update drivers but sometimes it's the only method available.
I found your DxDiag output from last July. If you ran a new one now you could compare the driver data side by side. That might reveal some issues.
Basically your system should be capable of running VR pretty well, but you may need to decrease some settings. Environment mapping, post lighting, shadows are the worst resource hogs and least needed.