The uninstall error is normal, 'cause CMG service isn't runnin'. Have you any errors on installation ? And please post your OS version.
Thank you for your help!
I haven't errors on installation, but after restart I had this first message from CMG: "Error: Can not create LPC port".
I have Windows XP Home Edition (version 5.01.2600 I think, but I don't know where to check it

).
Now I am trying to re-install Comodo Memory Guardian, but a lot of errors on every file, like this:

And finally:
