This article explains how to install Windows CE Touch Drivers

Windows CE systems are unlike standard Windows Operating Systems. You cannot simply "install" an executable driver file onto a CE system. CE installations require extensive knowledge of system development using Platform Builder to add the driver components into the CE image. 

If you do not understand how to build components into a system image then you will need to work with a developer to implement touch drivers into your system. Elo does not assist with doing this. 

Below is an example of what must be done to include CE touch drivers into a system image. This information is also in the release.txt file which downloads with each CE driver.

For each component, the install package includes CPU-agnostic bib, cec, pbpxml, and reg files plus
CPU-specific dll or exe, pdb, and rel (if dll) files. This release supports X86, ARMv5, ARMv7 and MipsII.

INSTRUCTION:
Please copy \EloMultiTouch\ folder in the zip file to \WINCE700\, and import EloMtUsb.pbpxml project
to OSDesign solution in platform builder (see ADD COMPONENTS). Select the following components in
Catalog Items View.

Composite Function Driver
USB Function Support
USB Human Input Device (HID) Class
Default Gesture Response
Gesture Physics Engine
Touch Gesture GWES component
Touch Screen (Stylus)

And make sure tchproxy.dll is included in the built CE7 image.

ADD COMPONENTS:
The quickest way to add the components is to insert them as existing projects, 
directly referencing their project (pbpxml) files. This is done for each 
component individually in Platform Builder by Project Insert Existing 
Project and pointing to the appropriate pbpxml file under wince700\EloMultiTouch, 
for example wince700\EloMultiTouch\EloMtUsb\EloMtUsb.pbpxml. All necessary output files 
will already exist under EloMultiTouch and simply remaking the run time image adds 
the components to nk.bin. Similarly, a component can be removed by deleting it 
from the Workspace Files view  and remaking the run time image.

REG FILES:
Touchscreen reg files (EloMtUsb.reg) must be merged 
into the OS image.  Platform Builder automatically merges the reg files of 
included components.