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I have an Acer Aspire ES1-111M (already upgraded to Windows 10 from 8.1) that was getting really sluggish, so I decided to reset it. I clicked Settings > Update & security > Recovery > Advanced starup > Use a device > USB > ... and I tried to click "Install Windows" but I noticed my touchpad wasn't working. At the time, I didn't think much of it. I just completed the rest of the install using only the keyboard. Eventually, Windows 10 finished installing and I noticed my touchpad still wasn't working. Since then, I've tried a few things to fix the problem, but nothing has worked so far.
Below are some random (or not-so-random) bits of information that might clarify my situation:
PS/2 Compatible Mouse:
In Device Manager, under Mice and Other Pointing Devices, a device called "PS/2 Compatible Mouse" suddenly showed up. It wasn't there at first.
Its Hardware ID is "ACPI\VEN_SYN&DEV_1B7D". I think it might be connected to Acer. But its Manufacturer, Driver Provider, and Digital Signer are all listed as Microsoft.
In Driver Details, two items are lised:
I looked up my laptop on acer.com, downloaded the touchpad driver listed, and installed it. The setup was completed and the status was listed as "ready to use". I rebooted, but my touchpad still didn't work.
Looking further, I noticed that inside the "Touchpad_Synaptics_126.96.36.199_W10x64_A" folder there was a file called "SynRMIHID.sys"
In the BIOS menu I switched the touchpad from advanced to basic, saved changes and exited, and restarted the computer. The touchpad still didn't work.
But I noticed, when switching from advanced to basic in the BIOS menu, there was text to the right that said something like the advanced setting wouldn't work unless the proper "I2C" driver was installed.
In Device Manager, under System Devices, the following device is listed:
Intel(R) Atom(TM)/Celeron(R)/Pentium(R) Processor Serial IO (SIO) - I2C Port 1 0F41
What stuck out for me was the "I2C" before Port.
And also the words Intel Serial IO.
Intel Chipset driver and Intel Serial IO driver:
I keep coming across the phrases "Intel Chipset" and "Intel Serial IO". To be honest, I'm not 100% sure why.
In Device Manager, under Other Devices, there are three "Unknown Device"s.
Also there is an Unknown USB Device under USB Controllers.
Right now, that's about all the information I have. I feel like I'm right on the edge of a solution with these pieces, but I'm not smart enough to figure it out. Could someone who is help me out?