Windows Defender found this in a system restore file of about a month ago.
No other programme found it in previous scans - I scan regularly with up to
date Norton 2006 AV, SpyBot and AdAware. Is this likely to be a false
positive?

(The message said VXIDL found in C:\System Volume
Information\_restore{B37680B2-BA0A-4E5D-BF30-83E44C588624}\RP730\A0123104exe->(CryptFF)
)

Thanks