1. download fastboot.zip (www_._share_._cx/files/216783534118/Fastboot.zip.html)
2. unzip fastboot.zip
3. power off phone
4. press and keep pressed menu key and plug in usb cable, notification led should be blue now
5. open cmd.exe
6. cd to the directory where fastboot.exe has been unzipped to
7. type "fastboot devices" and hit return
8. watch what happens
if you see something alphanumeric (see attachment) plus "fastboot" then you're lucky, your bootloader can be unlocked.
if nothing happened, try installing PdaNet (www_._junefabrics_._com/android/download.php) and retry. its installer comes with the needed driver files.
still nothing happened, your bootloader cannot been unlocked the official semc method
for me it worked, connection to fastboot was successful
(sorry about the "_" in the urls, i'be been only a xda-reader all the time, that's my first post, no urls allowed -.-)