Open Office 4.1.0 - McAfee Couldn't Verify

[Issy & Vern]

Hello,

I’m in the UK.  I’ve downloaded OO 4.1.0 from Sourceforge.net.  McAfee gave me 
a red shield with a warning that it could not verify the supplier of the 
software.  
Help please.

Thanks,
        Vernon Ford

PS - OO is great and has not given me this problem before.