How enable digital signature in windows xp

hi.. friends anyone of u.. could please help me .. i just right click my desk top icon and select digital signature enable option,
but after that the icon is visiable but its space oly allocated. so please advice me how disable it...???
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More about enable digital signature windows
  1. Could you kindly rephrase your question, please?
  2. Microsoft supplies digital signatures for key Windows components to insure that they're genuine, as a way to prevent unauthorized parties from substituting in device drivers or system .DLLs. However, if the subsystem that confirms digital signatures on components is damaged, a slew of difficult-to-diagnose errors may result.

    Examples of these errors include:

    * Service packs or hotfixes can't be installed.
    * The Windows Update website won't run correctly, and fails with an error message.
    * You see errors that Internet Explorer is not digitally signed.
    * You can't activate Microsoft software products over the Internet.
    * Device drivers are no longer reporting as being correctly signed.
    * Windows Genuine Advantage (WGA) reports the system as being inauthentic.

    Undetected problems with digital signing may be the biggest reason why WGA does not work correctly for many people with legitimate copies of Windows; many reports of this happening are coming up on the official Microsoft WGA Validation Problems forum.

    Fortunately, the solution is relatively simple, and can even be automated.

    1. Copy the following into a text file named FIXSIGN.BAT:
    regsvr32 Softpub.dll
    regsvr32 Wintrust.dll
    regsvr32 Initpki.dll
    regsvr32 Dssenh.dll
    regsvr32 Rsaenh.dll
    regsvr32 Gpkcsp.dll
    regsvr32 Sccbase.dll
    regsvr32 Slbcsp.dll
    regsvr32 Mssip32.dll
    regsvr32 Cryptdlg.dll

    2. Run FIXSIGN.BAT.

    3. Pay attention to any error messages that might appear. Ideally, after each regsvr32 command, you should see a "Component registered successfully" dialog box; click OK to dismiss it and continue. Note: Some components may take a long time to register. The pause at the end of the above list is optional, but it gives you a chance to digest the results of the entire operation before dismissing the window.

    4. Reboot the computer in question.

    5. Rerun the script on any other Windows XP computers that might need it.

    If the components in question don't register successfully, that might be a sign of other problems, such as a damaged COM+ catalog, which need to be dealt with first.
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