I have a Freecom DVB-T Art No: 25452
I know the revision 4 of this device runs a Realtek chipset, but I think this one has a different one but a Google search gives me conflicting information
Its VID is 14aa and PID is 022a
This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.
From here (waaay down page) it looks like it's based on the ZL353 chipset, natively supported in the linux kernel. (but you're not using linux)
Have you tried going to the manufacturer's website for drivers?
Going to the freecom.com website, product support, downloads & faq's..., several drivers available, one matching your given article 25452 for vista, which should work with Windows 7. Direct Link to driver download.
To recap, since the answer above might be lost in the noise:
Chipset is ZL353.