I have already posted this in the official thread...Just wanted my problem to be exposed to more people.... I had my motherboard changed due to a hardware problem. Windows 7 ultimate SP1 is installed in it (Model: Toshiba Satellite C655-S5061). When I brought my laptop from service center today, it showed that windows is not genuine (I guess because of change in motherboard). I tried to use Daz Loader 2.0.1 but it gives the message "The certificate wasn't successfully installed". I tried watfix and ran loader again but of no use. Any help?