Why MSNF3.5 causing me the problem? I have no idea, maybe it's because it conflict with my other apps. I have since installed more apps into my device and uninstall all the games and so far so good.
I also find something strange that I can only install apps into ROM, when I try to install into SD card the installation always fail.
MS Bing (really handy program for finding places, I had problem with this app when I also had Netframwork3.5 installed, but now it works fine)
MS Voice Command (again very handy)
No offense here, but didn´t you notice that every other person in this thread didn´t only blaim the srs wow app, they could even confirm this as the trouble maker?
So, as long as your keeping it, you will have the problem. It´s not related to the Framework or the mobile shell, so please stop blaming those if you´re not willing to test your phone without the SRS Wow Application.