Hi Gumshoe,
I have not seen this error before, is that the whole message? also what is the heading on the message & what operating system are you using. Have you tried the easycap on another PC?
Also try a system restore to before the program got the error check this link if you need help using it.
http://www.microsoft.com/windowsxp/using/helpandsupport/getstarted/ballew_03may19.mspx