Since upgrading to Wannadoo Broadband I now have a Task in my Task List that is just called '7'. Is it something to do with Broadband or is it another Trojan?
"7" is short for "Seven of Nine". The Borg have taken over your PC. Resistance is futile. You will be assimilated! ;-)
Not sure what it is. You should run antivirus and spyware detection software just to make sure, but it's probably nothing. I can't find any info on it, and you can be fairly sure that if it was malicious, or even just spyware, then there would be lots of info out there on the web about it.