Windows 10 device manager: "unknown devices", ACPI (Aspire V3-112P)

After a brand new installation of Windows 10 (64 bit / Education version) on my Aspire V3-112P-P5B3 I still have three "unknown devices" in my device manager and a warning concerning my "SDA Standard Compliant SD Host Controller". The first three say "Drivers not installed ..." and show in the "Details" tab the "Property: Device instance path" with the "Value: ACPI\INT33FC\n" (n = 1,2,3). The "SDA ..." says "Device currently waiting on another device ...". So I think the last problem might somehow be based on the first three problems(?).

I installed all drivers given on the Acer website for Win 10/64 bit.

I tried to update the drivers in the device manager ... the problems are still there.

I used the Intel "Driver Update Utility" ... the problems are still there.

I found some hints in the web concerning "ACPI\INT33FC\n" - but mainly on, in my opinion, strange sites for drivers updates. But somehow I do not trust those pages ...

Has anybody a solution for this problem? Or the same problem?

Is this a serious thing? Shall/can I ignore it? Maybe until an upcoming driver update by Acer?

Any help is welcome! Thanks in advance!