2Beig:
I recommend that you visit the VAIO support webpage and check if your model is supported for Windows 8. If it is, you will find the new drivers and other software to be updated. If it is not, don't worry, just uninstall any VAIO application that gives you errors.
I have not had problems with any drivers for devices (camera, finger scanner, audio, etc.). I also upgraded from Windows 7.
Good luck