How to install synaptics drivers on windows 8/8.1

A while ago Synaptics started to ship drivers which are not digitally signed, which means that they cannot be installed on Windows 8/8.1 (and maybe 7 too).
And to add insult to injury, some laptop manufacturers (Hi Dell!) provide their own Synaptics drivers, with some trimmed down features, such as no 3 and 4 finger gestures (Hi again Dell!).

After spending quite a bit of time trying to figure out how to install the drivers, I found the answer in on of Microsoft forums. Check Jesperten answer, which I reproduce below. I had to do both parts, as the driver was not loaded after installing it.

Here is a trick on how to install Synaptics Touchpad Driver v17.0.19 on Windows 8.1

    > WIN + I
    > Change PC Settings
    > Update and Recovery
    > Recovery
    > Under 'Advanced startup' click 'Restart Now'. Make sure to save your work first.
    > Select 'Troubleshoot'
    > Advanced Options
    > Startup Settings and click Restart
    > When it boots up, press 7 to Disable driver signature enforcement
    > Install Synaptics as you would normally do.
    > Restart

If the driver is not working properly and if the Synaptics settings does not appear under Mouse properties after completing the preceding steps, try the following:

    > Open device manager
    > Find the touchpad device (“PS/2 Compatible Mouse”)
    > Right click on the device and click “Update Driver Software”
    > Select “Browse my computer for driver software”
    > Select “Let me pick from a list of device drivers on my computer”
    > Uncheck the option “Show compatible hardware”
    > Under “Manufacturer”, scroll down to “Synaptics”
    > Under “Model”, the 17.0.19 driver should appear.
    > Select the driver and click next.
    > Click “Yes” to the “Update Driver Warning” pop-up.
    > Restart 

Now, the Synaptics settings should appear under Mouse properties, from where it should be possible to change all the desired modifications to the touchpad like disabling Edge Swipe and invert two finger scroll directions.

This worked for me at least. I hope that others might find this trick helpful.

Thanks a lot Jesperten!!

Synaptics trackpad configuration and the dreaded "Windows Shell Common Dll has stopped working"

Recently, I've been repurposing my wife old laptop (a dell 1520 from 2007) after I was surprised how much faster it bacame after installing an SSD.
One of the things that I wanted to configure was the synaptics touchpad to have finger gestures (specially the 3 finger back and forward for the browser). After finding a suitable driver (as the lastest Synaptics drivers don't work on windows 8.1), I had to manually update the driver to the Synaptics one, because windows would keep setting it as a generic touchpad.

So finally, I had the driver installed, and I was ready to configure it... but when I tried to access the configuration screen I got the helpful message "Windows Shell Common Dll has stopped working".

Mouse properties

Windows Shell Common Dll has stopped working

After searching for about 1 hour, I found a few posts from people who got the same error when they tried to play a video... and the Synaptics tool does try to play a video to demonstrate each feature... a smoking gun.

Since my hacking skills are non-existent, I decided to take the low cost approach of removing all the wmv files from the folder where the driver was installed (c:\Program Files\Synaptics\SynTP\ in my case). After that I was able to access the configuration window.

Synaptics configuration window

It's a pitty that Synaptics doesn't have an option to configure right clicks in the same way as MacBooks (one finger pressed + one tap). It does have a right click with a 2 tap, but I think the other gesture is easier to use.