Acrobat.com is a wrapper for Adobe Connect/ CS Live. If you don't use it, there's no need to update it. That may only be required for specific features associated with it, but since I'm not using it, either, I can't tell you which that may be. The error itself may be some reference to the Flash stuff used in the applet. In any case, this issue would probably resolve if you made use of your account and the required plug-ins/ applets would update then...
Thanks for your answer, Mylenium.
I understand that Acrobat_com supports another program on my netbook, that I haven't used untill now.
Acrobat_com will update itself when I use that other program.
I think Acrobat_com is one of the programs, which is installed on the hard disk with a lot of other programs by Asus.
I will check my assumption by contacting Asus technical support.