Some Files Cannot Be Scanned. Why?
The Virus Protection cannot open files that are
- currently in use by the operating system
- protected/locked by the operating system.
The files that cannot be scanned have normally a .sys and .ini extension which means that they are system and registry files. The following are examples of such files:
- C:\boot.ini - the file that tells the computer where to find the operating system
- C:\ntdetect.com - a file of the operating system
- C:\Documents and Settings\<username>\ntuser.dat - the file that contains the user profile
- C:\Documents and Settings\<user>\Local Settings\Application Data\Microsoft\Windows\Usrclass.dat - a file that is part of the User Profile
- C:\Windows\System32\Default - this contains the Registry
- C:\Program Files\F-Secure\Backweb\<multiple files> - these are F-Secure-specific files in use
- C:\Pagefile.sys (or win386.swp) - the default page file
- C:\hiberfil.sys - the file to be used during hibernation, i.e. Save System State to Disk
- and other windows core components as well as some F-Secure-related files. These files cannot be accessed during scanning as they are protected by the operating system.
Apart from files that are protected by the operating system, applications that are currently
running in the background will also not be accessible during the scanning. Minimizing the number of
open applications and network connections while performing a scan will minimize the amount of
skipped files. Or you can also perform a system scan once your computer starts up before you open any other