Basically a good Idea but for Websites you have to this approximately 20 times a page; you have to install eset.cer after it should work for most pages
Mailprovider GMX doesn't support Opera12.x anymore so I didn't find the error in Detail - GMX and Eset Viruscan doesn't support the old Opera, so to ask support doesn't help, the say install modern Software.
with a new Opera1218 and NOD32 it's not possible to open gmx.net