Trouble finding drivers from Acer

When I was having trouble with the colors on my, fwiw, Acer Aspire
E5-573, and again when I got a yellow triangle warning in Device Manager
telling me to reinstall a driver** for  Mobile 5th Generation Intel(R)
Core(TM) SMBus Controller 9CA2, I went to the Acer web site and found
the suppport page for my model, but not only was there no newer driver
for either one, there was no list of drivers at all.   

The only thing there was Acer Quick Access, and all that does is let you
adjust bluelight reduction, power-off usb charging, and what the power
button does, most of which is already done and settled. 

1)  The laptop was built for win7 or 8, and is maybe 10 years old, but
so what? Is this a serious bad mark against Acer in general that it
doens't have the list of drivers?   My problems are currently solved and
I have backups of the whole system, but should I complain to Acer, so
they know people don't like this? 

**For SMBus, the Device Manager entry said to install a new driver, so I
used the Driver tab of the Device Manager Properties box to search for a
new driver and there was not one in my PC, so it suggested Windows
Update.  There, in the list at View all Optional Updates, there was a
driver listed that exactly matched, every word, what I was looking for,
so I dl'd it and installed it and the litle yellow triangle in the icon
disappeared even before I restarted windows, like the instructions said
to do and implied I had to do.  And after I restarted Windows it still
said "No drivers are installed for this device" but the yellow triangle
was gone.  

2) What was this about?  Why was it running me around to install a
driver and then telling me no driver is installed but the yellow
triangle is gone anyhow?