Pop-up in c#

hi guys thanks everyone for help in my last post now i made my windows service that get response from a web service and everything is working well.

all that i need now is:
1- The windows service should pop-up something saying there is a new application to be downloaded in case the webservice replied by val=1 and link for an exe file.
these file can be downloaded in the pc so the user can install it .
N.B: Like windows update link and pop-up that is shown in the taskbar that telling us that there is a new update and you can download it from this link
so that
The user should click on the pop-up and click on the link on the pop-up, to download the new application, like he downloaded the windows service before.

can anyone tell me the idea about doing this task??