How to solved Fgtech v54 won’t start after installation

Question: Fgtech v54 won’t start after installation
Top 6 Reasons To Get FGTech Galletto 4:
1. Latest Version: 2014 V54
2. Supported Operating System: windows XP. more friendly than Fgtech v53 , much easier to operate
3. Unlock Version: Can Use Directly. No Need To Activate
4. FGTECH V54 PCB board
5. Supported Languages: English, Italian, German, French, Spanish, Portuguese, Czech, Turkish
6. Support Tricore Function

Answer: Start with steps here:
First,
do a fresh install of windows

Second,
remove the old FGTech Galletto from system totally
That is, you need to remove all previous installs system files of fg

Third,
check your FGTech Galletto V54 drive, check if all is well, there’s driver for 32bit and 64bit. (if you uninstall all previous versions). Use the USB fix that comes on the cd.
If Fgtech v54 not open in OBD2, re–install again without deinstalar the v54. and try to open the Obd2 again. 

Fourth,
check ftd2xx.dll file. If this file was read only and you have to change this unmarking read only in location – widows/system32/ftd2xx.dll.

Now is working !!!!!!!!