Hello,
Some of the windows operating system policies are does not allow to run wusetup.exe file due to the critical words like setup, install, update etc. You would better to change the name of the exe file which contains in WUpdate.pas file. In my case i replace wusetup.exe with wuupd.exe so it works fine.
This is by design. From Windows Vista, there are new security policies that require an app to elevate to admin privileges to be able to replace files in protected folders just like \Program Files. As the goal of TWebUpdate is just that, this needs to raise the UAC prompt anyway.
This feature will not be implemented.