Win32.DataSneak is categorized as a backdoor Trojan. It will enter your system unannounced and without your permission. Once inside, its backdoor component will allow it to give access to additional malware. This is where you can have real danger. Hackers are waiting for this opening in order to enter and have full access to your personal information. They will be able to steal logins, passwords and virtually anything else they want.
Remove at Once
Removal of Win32.DataSneak can happen by stopping all running processes and then searching for and removing all other related files to the program. This process takes some experience and if you are at all unsure then you can do some damage to your system. For safe and effective removal of spyware, you should try SpyZooka. SpyZooka is a trusted anti-spyware application that promises to remove Win32.DataSneak and any other spyware you may have.