1. You may access following link to download the later driver.
ftp://cs0712:pen0712@ftp.penpower.com.tw/cs/WinXp32.zip
ftp://cs0712:pen0712@ftp.penpower.com.tw/cs/Winxp64.zip

2. Please try to decompress the attached zip file and use copy and past this folder(WinXp32) to under C:\Windows\Temp\
Please try to decompress the attached zip file and use copy and past this folder(Winxp64) to under C:\Windows\Temp\

3. Please go 「 Start 」->「My Computer」-> right click 「Properties」

4. Please Choose「Device Manager」

5.Please find「Other devices」-> at「600 dpi USB Scanner」 right click and choose 「update driver software」

6. Please Choose「No, not this time」and than click「Next」

7. Please Choose 「Install from a list…」and than click 「Next」

8. Please Choose「Include this location in the search」and than click「Browse」button-> choose the path 「C:\Windows\Temp\Winxp32」

9. Ultra driver installation complete.

10. Please check first if the calibration is working.