Its recognized OK the USB but its not shown any data. I cannot format it becausevi have important data inside. As I understand a antivirus removed the .exe file and that why I have problem. Its any software that I can use so to recaver the .exe file or data shown?
Google "Recover files deleted by anti virus." Any suspicious exec file will be zapped by your security program. There are some software programs available to get back such files but I've no idea how effective they are. Typically, although you get a free trial, I suspect that if it shows you the missing files you will have to pay the subscription to actually recover them. Sometimes security software gets it wrong (false positive) or it may remove "cracked" files that enable protected software to be installed as pirated software.