In group policy go to “Computer Configuration” -> “Preferences” -> “Windows Settings” -> “Registry”

Right click on “Registry” and select “New”->”Registry Item”

In the new registry item select “Delete” then specify the path and item you want to delete.

Following values are for java updates

HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\SunJavaUpdateSched

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SunJavaUpdateSched

And/or delete the file using GPO:

%CommonProgramFiles(x86)%\Java\Java Update\jusched.exe
%CommonProgramFiles%\Java\Java Update\jusched.exe