When configuring the Windows XP operating system is sometimes necessary to replace some system files .But you can not replace the file, since the system does not allow it, or restore the original file is replaced by a copy.However, this limitation can be circumvented.
protection system files from replacement or modification is an important factor to protect the operating system from the effects of the virus and Trojans.Therefore, disable protect system files unless absolutely necessary, it is not recommended.
Since Windows hides protected operating system files, they must first be made visible.To do this, open any drive or folder, select the menu: "Tools" - "Folder Options" - "View".Remove the birds from the lines of "Hide protected operating system files" and "Hide extensions for known file types."Check "Show hidden files and folders."Click "Apply to All Folders", then "OK."
Now you can see all the files and their extensions.If you need to replace any single file,
the easiest way to do this by booting through another operating system or LiveCD.Before changing do not forget to create a restore point: "Start" - "All Programs" - "Accessories" - Service "-" System Restore. "Replacement file is saved in a separate folder.
In the event that after changing the file system does not start, return the same way to the place of the original file.Alternatively, press the F8 key at startup to select "Last Known Good Configuration."And it does not work - try in the same menu, select "Load in safe mode."Then, after the operating system, select System Restore.
If you still want to disable the protection system files, open the Registry Editor: "Start" - "Run" command regedit.Find a way to: HKEY_LOCAL_MACHINE SOFTWARE Microsoft Windows NT CurrentVersion Winlogon.Select the folder Winlogon, get in the right window option SFCDisable.Click the right-hand mouse button, select "Change."In the opened window, replace the 0 in the ffffff9d.After rebooting, the System File Protection will be disabled.
Do not leave system files vulnerable.After you set up the system fit you properly, reopen this setting and once again restore its original value.Do not forget to reboot your computer for the changes to take effect.