I met the same form, but the content was different. It might help to clean it up. I hope this idea can be referenced:

An oriental advertisement appeared to me, and disappeared as soon as I opened the webpage. Without the foreground program, you can't close and search through the task manager. Instead, click taskbar properties:

Customization of point notification area:

Found that the program is a system program RunDll, which is generally realized by mounting other Dll files with the system RunDll, so I started the task manager again, and sure enough, there is a RunDll running:

To find out the actual running dll file, you need to display the command line, click the view menu and select "Select Column ...":

Check the command line:

Confirm exit and find the actual command:

Actually, it's not rundll32 of the system, but Master Lu's, and it's located by everyting:

Open the folder above, which happens to be the latest advertising icon:

Then open the folder where popex.dll is located:

Copy the file name first, and then forcibly delete it.

Create a new empty text file in its original location, and then (with the extension) rename it popex.dll. When finished, right-click to open the property and check the read-only property to prevent resurgence.