Hi,
not to be angry!
uninstall your NSU and all usb drivers.
download the latest available NSU(i think its 1.4.39).
disable your windows firewall and antyviruse program.
connect your phone with compatible cable in general profile mode.
run NSU progam.
be attention you need meduim pc requirements:
1GHz, or higher, Pentium-compatible processor.
At least 256 MB of RAM (memory).
Windows 2000 (SP4 or later) or Windows XP (SP1 or SP2).
Administrator rights to install.
and
"High-speed internet connection".
if you have this problem try via another pc or laptop.
i hope to solve your problem.
NOKIA means:Night Of King In Alone