Bdtyktl

The problem is that Synaptics "palm check" is not your problem. Palm check detects that your hand is resting on the touch pad, and will not intemperate that as an attempt to move the mouse.

The problem is a setting in windows 8 that disables tapping while typing. However the correct driver should automatically disable this, and use palm check only.

Make certain that your driver is in fact up to date. Make sure you get the latest driver from the manufacturer that is intended for your laptop and for Windows 8. If no driver is offered for Win 8 try the Win 7 driver, or the generic driver from http://www.synaptics.com/resources/drivers. Be sure to fully remove your driver before installing another version. If there is no Win 8 OEM driver for your device, and none of the others work either, then you can try disabling the setting manually:

Unfortunately I can not seem to find the location of the setting! It's easily accessed in 8.1:
Open the charms menu, select settings > "Change PC Settings" > "PC and Devices" > "Mouse & Touchpad" and disable the taps delay.
But I can not locate the same setting (which may have a different name) in normal Windows 8.

If the setting is grayed out (or otherwise impossible to change) then you may need to remove your drivers, disable the setting, then re install them.

If it still doesn't work, then I am afraid you will need to contact your laptops manufacturer for assistance. They may release a new driver in the future, or it may not be possible to fix. In the second case, there may be third party software that can help you.

At least that's how I got it to work when I had a similar problem. Though soon after fixing it a new version of the driver was released that not only would have fixed it, but made it work even better. YMMV

In a similar post - Use touchpad while “typing”? - the following answers were proposed.

Disable/reduce SmartSense

This described in detail in
How to Turn PalmCheck On or Off for Touchpad in Windows.

• Open Control Panel -> Mouse


• Click on the TouchPad Settings tab, then on ClickPad Settings.


• Double Click "SmartSense"


• Slide the Slider all the way to "Off"


• Click Close and OK.

The article Prevent Touchpad From Being Disabled by Keypresses says further:

Although it doesn’t mention disabling the touchpad while typing, it in
fact does do this while set above 50%.

I recommend setting it to around 50%, or have a play around to find
what works best for you. You can test whether the touchpad is still
being disabled easily by selecting a new value, then holding the Tab
key and attempting to move the touchpad. If the touchpad stops
responding after a couple of seconds, the PalmCheck setting is still
too high.

Registry update

In the Registry, go to the key
HKEY_LOCAL_MACHINESOFTWARESynapticsSynTPDefaults, and set the
value of all string entries of the form PalmKms…, to 0. (Of course,
they probably don't all need to be 0, but have fun finding out which
one(s) you actually need!) These values determine the amount of ms
that the touchpad stays disabled after keyboard input has been
detected.

I am not 100% sure it will help, since I don't have a laptop with a Synaptics touchpad, so I can't test this application. But try TouchFreeze, it's free.

harrymc's solution works for me.
I made .reg file for setting it, as it's reset sometimes.
Be aware I'm using 32-bit and I don't guarantee it's the same on 64-bit.

.reg file
open it in notepad and see

set all PalmKMS** to 0

None of the solutions offered by others solved the issue very well. Using the old Windows 7 drivers did work in Windows 8 but then other features were absent, such as two-finger smooth scrolling. When I was on Windows 7 with the old drivers I had used a utility called TwoFingerScroll which solved this problem for me, but it does not work on Windows 8.

In the end, the way I actually dealt with the problem was to disable PalmCheck AND to disable tapping on the touch pad. Both are options in the Synaptics control panel. Now, even though my palm might move the mouse it does not cause the click which was driving me crazy before.

When using Synaptics Touchpad:

1. Go to contol panel then go to mouse settings (Mouse Properties).




2. Open the last tab (Device Settings) and in the center right there should be a box that says 'settings...', Click on that and it brings up 'Properties for Synaptics TouchPad V7.5 on PS/2 Port' (for me).




3. Open the '+' next to 'Pointing (3rd one down), then 'Sensitivity' (1st one in pointing) and go to 'TouchCheck'.




4. Slide the slider to Minimum for enabling the touchpad while typing (for games or productivity, etc. ) and to Maximum when wanting no touchpad when typing (accidental palm, etc. ). This is what worked for me.

I am using windows 8.1