Users noticed that the icons in the task bar went white.
This was due to  a lot of folders and files were deleted in the User Profiles

Example

Appdata\Roaming\Adobe\Acrobat\2017\ Appdata\Roaming\Google\Chrome\ Appdata\Roaming\Macromedia\Flash Player\ Appdata\Roaming\Microsoft\Credentials\ Appdata\Roaming\Microsoft\Document Building Blocks\ Appdata\Roaming\Microsoft\Excel\ Appdata\Roaming\Internet Explorer\Quick Lauch\ Appdata\Roaming\Microsoft\Network\Connections\Pbk\ Appdata\Roaming\Microsoft\Office\ Appdata\Roaming\Microsoft\Protect\ Appdata\Roaming\Microsoft\Signatures\ Appdata\Roaming\Microsoft\Spelling\ Appdata\Roaming\Microsoft\UProof\ Appdata\Roaming\Microsoft\Windows\Recent\ Appdata\Roaming\Microsoft\Windows\SentTo Appdata\Roaming\Microsoft\Windows\Start Menu\Programs\ Appdata\Roaming\Micorosft\Windows\Themes\ Appdata\Roaming\Mozilla\Firefox\ Appdata\Roaming\SAP\* Appdata\Roaming\Sapworkdir\ Appdata\Roaming\Virtuall Solutions\Virtual User Environment Manager\Agent\*

Problem Cause

WEM Agent and Profile setting compatibility