NullPointerException when scanning files on C:\

I am scanning all the files on the C:\ drive and when the scan comes to the end of the hard drive it finds the directory:
C:\System Volume Information
which is neither hidden nor can it be seen when I enable viewing of hidden files.
Anyway, when it comes to this directory and tries to read its contents, it throws a NullPointerException.
Anybody have any ideas on how I can bypass this?
Thanks in advanced

I assume, that you are using a win-system.
"C:\System Volume Information" is realy present in NTFS and FAT32.
Its hidden and it's a system folder.
Default setting of explorer is, that system files are not shown. So it's not enough to show hidden files, you have to enable system files too in explorer settings.
In Fat32 you are able to access this folder (but better leave it alone!).
In NTFS you can't read it's contents, even if you are admin.
You are simply missing the rights!
So of course you have to do some error handling, if you are missing the rights of accessing something. (This should be done in any case)
Don't know the methods you are using, so i cant't give you a sample.
Good luck.

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