This means you have not shut down IIS services when installing AspUpload,
or an eval version was installed by mistake.
When running the setup application aspupload.exe ,
make sure the splash screen reads "Registered Version".
When asked by the AspUpload setup whether you want to shut download
and restart IIS, you must say yes. Shutting down IIS is necessary
to remove an old (eval) version of aspupload.dll
from the server's RAM. Failure to do so will result
in the old DLL running instead of the newly installed DLL.
Instead of letting the aspupload.exe setup shut down and restart IIS,
you may choose to do so manually prior to running the setup. At your command
c:\> net stop iisadmin /y
Then run the setup. You will no longer be prompted to shut down IIS because
it has just been shut down manually. Afterwards, restart your IIS-related services
via the Services control panel, or via the command prompt.
This article only applies to AspUpload version 2.x. Version 3.0 does not require IIS to be restarted when registering the product.