Scan results warning Boot record...

Avast Free Antivirus / Premium Security
1

I ran a full scan and there is a warning about
Result: some files could not be scanned
File name: Disk\?.…{-}Boot Record
Error: The parameter is incorrect(87)

2

http://forum.avast.com/index.php?topic=141883.0

for more info, search forum for some files could not be scanned