Virus ou pas?

Bonjour,
en faite j'ai fais un scan et et le rapport voici:
Starting the file scan:

Begin scan in 'C:\'
C:\pagefile.sys
[WARNING] The file could not be opened!
[NOTE] This file is a Windows system file.
[NOTE] This file cannot be opened for scanning.

End of the scan: vendredi 20 mars 2009 11:45
Used time: 19:28 Minute(s)

The scan has been done completely.

2488 Scanned directories
199148 Files were scanned
0 Viruses and/or unwanted programs were found
0 Files were classified as suspicious
0 files were deleted
0 Viruses and unwanted programs were repaired
0 Files were moved to quarantine
0 Files were renamed
1 Files cannot be scanned
199147 Files not concerned
1493 Archives were scanned
1 Warnings
1 Notes
24836 Objects were scanned with rootkit scan
0 Hidden objects were found

il a trouvé un warning.
qqn peut m'aider? S.V.P;