I never was able to get my HP Windows 7 (64bit) desktop to recognize my 950. It had no problem recognizing my 350 though. My HP (WinXP) netbook recognized both the 950 and 350 without any issues. I spent a lot of time researching the issue and talking with Sony and HP but was never able to solve the problem.

Since I've read quite a few people have this issue with the 950, I assume it is a Sony driver problem which Sony refuses to address properly.