The latest version of Protector Suite for SONY VAIO SZ series can work both
XP and Vista.
1. uninstall any previous version
2. reboot
3. download this versio from
http://dlsvr03.asus.com/pub/ASUS/nb/R1F/FingerPrint_Vista32bit_070126.zip
and install it.
4. reboot
I tested it on my XP sp2, works fine. This also supports both IE 6 (I don’t
know if it works with IE 7) and Firefox 2.0.x.

Ref: http://forum.notebookreview.com/showthread.php?t=101461