Hi, I work at Kobo.
If you have XP service pack 2 or below, upgrading to SP3 should fix the problem.
Alternatively (or if you already have SP3) you can try installing this free XP add-on (Visual C++ runtime):
http://www.microsoft.com/downloads/d...displaylang=en
Feel free to email me at shasan at kobobooks dot com if neither solution works, we'll try and get you up and running asap.