Hey there,
Please be aware that integrated GPUs are not recommended for Diablo II: Resurrected and are not on the supported list. This means it is likely you will encounter issues while playing.
However Based on the GPU information you provided along with the Driver version I can say you do not have the latest drivers installed.
You mentioned version 26.20.100.7925 but I see a much newer driver available on the Intel Website:
They don’t even list your driver but the oldest driver they do list looks to be the next one and it was released 03/25/20 or over 2 years ago. So this is likely the source of your troubles.