When installing XCTU, i was asked if i would like to update the XCTU (recommended). After pressing yes, there is an error coming out saying Microsoft Visual C++ problem, then installation failed.
If i press No to update, when i connect my Xbee to my laptop, i couldn’t Read it, when i press the read button, i was ask to update, then it shows an invalid argument was encountered.
Did you download X-CTU from the following link, http://ftp1.digi.com/support/utilities/40003002_C.exe ?
(Run as Administrator).
I m also using Windows 7 and it works for me.
Unistall and install again and see it it works.