AVIRA ANTIVIR WARNINGS - QU'EST-CE?

Bonjour,

2 warnings apparaissent dans le rapport de mon scan Antivir. Ce sont 2 fichiers qui n'ont pu être ouvert. J'aimerais savoir ce que c'est et si il y a une manipulation possible pour détecter s'ils sont infectieux. Je colle la partie intéressante du rapport de mon scan à la suite du message. Merci d'avance pour votre aide.
V4J

Avira AntiVir Personal
Report file date: dimanche 4 janvier 2009 14:51

[...]

Starting master boot sector scan:
Master boot sector HD0
[INFO] No virus was found!

Start scanning boot sectors:
Boot sector 'C:\'
[INFO] No virus was found!
Boot sector 'D:\'
[INFO] No virus was found!

Starting to scan the registry.
The registry was scanned ( '65' files ).

Starting the file scan:

Begin scan in 'C:\'
C:\hiberfil.sys
[WARNING] The file could not be opened!
C:\pagefile.sys
[WARNING] The file could not be opened!
Begin scan in 'D:\'

End of the scan: dimanche 4 janvier 2009 15:16
Used time: 24:34 Minute(s)

The scan has been done completely.

3870 Scanning directories
156740 Files were scanned
0 viruses and/or unwanted programs were found
0 Files were classified as suspicious:
0 files were deleted
0 files were repaired
0 files were moved to quarantine
0 files were renamed
2 Files cannot be scanned
156738 Files not concerned
886 Archives were scanned
2 Warnings
0 Notes