SpyBot detects two Registry entries and marks them as "Trojan Win32.Delf.uv":
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Win32.Delf.uv: [SBI $32D4885B] Einstellungen (Registrierungsdatenbank-Schlüssel, nothing done)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\bdagent.exe
Win32.Delf.uv: [SBI $68A02A96] Einstellungen (Registrierungsdatenbank-Schlüssel, nothing done)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\vsserv.exe
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Both Executables are part of "BitDefender Antivirus 2012" Software.
We checked the PC with several Rescue Disks (Avira, Kaspersky) and several Remove Tools (GMER, Sophos, Blacklight) but none of them found any threats.
Why does SpyBot mark those two Exes as dangerous?!?!

(OS is: Win Vista 64-bit)

Thanks in advance for any good idea and Greetings from Munich, Germany