You receive a "Digital Signature Not Found" warning message when you use the Add/Remove Programs tool in Control Panel to remove IntelliPoint software (253499)


The information in this article applies to:

  • Microsoft IntelliPoint Software 5.1
  • Microsoft IntelliPoint Software version 4.1
  • Microsoft IntelliPoint software 3.0
  • Microsoft Wireless Notebook Optical Mouse
  • Microsoft Laser Mouse 6000
  • Microsoft Optical Mouse Blue
  • Microsoft Optical Mouse by Starck
  • Microsoft Wireless Laser Desktop 6000
  • Microsoft Wireless Laser Desktop 6000 v2.0
  • Microsoft Wireless Laser Mouse 6000
  • Microsoft Wireless Notebook Laser Mouse 6000
  • Microsoft Wireless Notebook Optical Mouse 3000
  • Microsoft Wireless Notebook Optical Mouse 4000
  • Microsoft Wireless Optical Desktop
  • Microsoft Wireless Optical Desktop 5000
  • Microsoft Wireless Optical Desktop Comfort Edition
  • Microsoft Wireless Optical Desktop Pro
  • Microsoft Wireless Optical Mouse 2.0
  • Microsoft Wireless Optical Mouse 3000
  • Microsoft Wireless Optical Mouse 2000
  • Microsoft Wireless Optical Mouse 1000
  • Microsoft Wireless Optical Mouse Blue
  • the operating system: Microsoft Windows 2000
  • Wireless Optical Desktop 3000
This article was previously published under Q253499

SYMPTOMS

When you use the Add/Remove Programs tool in Control Panel to remove the Microsoft IntelliPoint software version 3.1 or later versions on a Microsoft Windows 2000-based computer, you may receive a dialog box that contains the following warning message:
Digital Signature Not Found

The Microsoft digital signature affirms that software has been tested with Windows and that the software has not been modified since it was tested.

The software you are about to install does not contain a Microsoft digital signature. Therefore, there is no guarantee that this software works correctly with Windows.

PS/2 Port Mouse

If you want to search for Microsoft digitally signed software, visit the Windows Update Web site at http://windowsupdate.microsoft.com to see if one is available.

Do you want to continue the installation?
If you click Yes, you can remove the IntelliPoint software in the usual manner.

If you click No, the process of removing the IntelliPoint software proceeds in the usual manner until your computer restarts, when this occurs your pointing device may stop functioning.

Note When you click No, you may receive a dialog box stating that the Ipfilter.sys file has not been removed. You may receive this warning multiple times (one time for each pointing device that is connected to your computer). When your computer restarts, the system tries to find and load the Ipfilter.sys file, because the reference to it still exists. If you click More Info, you receive a dialog box that contains the following message:
More Information

Windows did not find a Microsoft signature associated with the software package you want to install.
When you click OK, you receive the initial dialog box that contains the "Digital Signature Not Found" warning message.

RESOLUTION

To work around this issue, use either of the following methods to recover the Ipfilter.sys file.

Restore the Ipfilter.sys File

To restore the Ipfilter.sys file:
  1. When your computer restarts, you are prompted with a Files Needed dialog box.
  2. Insert the IntelliPoint CD-ROM into the CD drive.
  3. Press ENTER.
  4. Follow the instructions on the screen to finish installing the Ipfilter.sys file.

    Note If your pointing device is connected to the computer through the PS/2 port, you must restart the computer.

Restore the Windows 2000 Mouse Driver

To restore the Windows 2000 mouse driver:
  1. When your computer restarts, you are prompted with a Files Needed dialog box.
  2. Press TAB three times to select Cancel, and then press ENTER.
  3. Press CTRL+ESC to display the Start menu.
  4. Press the UP ARROW key until you point to Settings, press the RIGHT ARROW key to select Control Panel, and then press ENTER.
  5. Press TAB four times, use the ARROW keys to locate and select the System tool in Control Panel, and then press ENTER.
  6. Press the RIGHT ARROW key until you select the Hardware tab.
  7. Press TAB three times to select Device Manager, and then press ENTER.
  8. Press TAB one time, and the press the DOWN ARROW key until you select Mice and other Pointing Devices.
  9. Press the RIGHT ARROW key one time to display the list of pointing devices.
  10. Press the DOWN ARROW until you select your pointing device, and then press ENTER.

    Note You see a red "X" through the device icon.
  11. Press TAB four times, and then use the RIGHT ARROW key to select the Driver tab.
  12. Press TAB three times to select Update Driver, and then press ENTER.
  13. In the Update Device Driver wizard, press ENTER, and then press the DOWN ARROW key one tiem to select Display a list of the known drivers for this device so that I can choose a specific driver.
  14. Press TAB two times to select Next, and then press ENTER.
  15. Press the DOWN ARROW key until you select your mouse.

    Select either HID-compliant Mouse for a USB (universal serial bus) pointing device, or PS/2 Port Mouse or PS/2 Compatible Mouse for a pointing device that is connected to the computer through the PS/2 port.
  16. Press TAB four times to select Next, and then press ENTER.
  17. Press ENTER again to confirm that you want to install the driver, and then press ENTER again to continue the installation.
  18. You may receive the dialog box with the "Digital Signature Not Found" warning message mentioned in the "Symptoms" section, or you may receive the following message:
    Confirm Device Install

    The driver for the device you have selected also controls keyboard port devices.

    If you install support for this device, your current keyboard port driver(s) may be replaced. Are you sure you want to install this device?
    Press ENTER (Yes), and then press ENTER again.
  19. Press TAB three times to select Close, and then press ENTER.
  20. Press ENTER again to restart your computer.

    Note If your pointing device is connected to the computer through the PS/2 port, you must restart the computer.

MORE INFORMATION

If the steps in the "Resolution" section did not resolve the issue, then there maybe an error with the operating system.

To perform a repair of your operating system:
  1. If your computer can start from the CD drive, insert the Windows 2000 CD-ROM into the CD drive. If you cannot start from the CD-ROM, insert the installation floppy disk number one in your floppy drive.
  2. Restart your computer.
  3. Press ENTER when the "Welcome to Setup" screen presents the following three options:
    1. Press ENTER to continue Setup.
    2. Press R to repair.
    3. Press F3 to quit.
  4. When you receive the following prompt:

    If one of the following Windows 2000 installation is damaged Setup can try to repair it.

    use the arrow keys to select the installation of Windows 2000, and then press R (Repair).
  5. Follow the instructions that appear on the screen to complete the repair.
  6. Restart your computer.
Modification Type:MajorLast Reviewed:10/6/2006
Keywords:kbHardware kbprb KB253499
©2004 Microsoft Corporation. All rights reserved.