Victory!

I fixed it!

It seems like the first installation of PC Suite failed but when I run remove program, the program was not removed. So when I reinstalled it, the error remained. But when I removed all the files manually and restarted the computer, I could complete the installation.

But the installation function of PC Suite is a shame for the industry and for Sony Ericsson. But I fixed it and that is what is most important right now.