Fix Windows Update Error 0x800B0100 & Error Code 80245003

Fix Error 0x800B0100

The following error message may be displayed when you try to run Windows Update on your computer:
Error number: 0x800B0100
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Resolution Method

Error 0x800B0100 may occur due to many different reasons. Given below are a few methods that you can use to resolve the problem.

Method 1: Ensure that All Windows Update Services are Running on the System.

  1. Open Start menu, select Run, type services.msc and then press Enter.
  2. In the Services management console window, ensure that the status of the following services is Started.
    • Automatic Updates
    • Background Intelligent Transfer Service
    • Cryptographic Services
    • Remote Procedure Call
    • System Restore Service
  3. Note: In case a service has not started, right-click on it and then select Start.

  4. Next, open the Windows Explorer window and navigate to the C:\WindowSystem32 folder.
  5. Note: Here, C:\ represents the root drive of your Windows computer.

  6. Check if the CATROOT2 folder exists here.
  7. If the folder CATROOT2 folder does exist, perform the following steps to rename it:
    1. Open Start menu, select Run, type cmd, and then press Enter.
    2. At command prompt, type the following commands to stop the Cryptographic Services, rename the CATROOT2 folder and then restart the Cryptographic Services.

net stop cryptsvc
ren C:\system32\catroot2 catroot2_Old
net start cryptsvc
Note: You will be able to rename the folder only if you are logged on to the system as an administrative user.

Method 2: Register the wintrust.dll File on the System

To do this, open Start menu, select Run, type regsvr32 wintrust.dll and then press Enter

Method 3: Uninstall any recently installed program

Error 0x800B0100 may also be generated if there are problems with a program that you recently installed on the system. So, if the error occurs, uninstall any new programs you have installed recently. You can do this easily with the help of the Windows Add or Remove Programs utility or a reliable third-party program uninstaller tool, such as Perfect Uninstaller.

Method 4: Perform System Restore

If you are unable to fix the error by using any of the above methods, then you may perform a system restore to revert your system settings to the time your system was free of error 0x800B0100.

Fix Error Code 80245003

Error code 80245003 may be generated, when your system is unable to search for and download new updates.

Resolution Method

This error may occur if the SoftwareDistribution folder on your system is corrupt. To resolve it, rename the folder and then attempt the Windows Update again by performing the following steps:

  1. Open Start menu, select Run, type sysdm.cpl and then press Enter.
  2. On the Automatic Updates tab, select the Turn off Automatic Updates option and then click the OK button.
  3. Open My Computer, and navigate to the C:\WINDOWS folder.
  4. Note: Here, C:\ represents the root drive of your Windows computer.

  5. Right-click the SoftwareDistribution folder, and select Rename.
  6. Provide a new name, for instance SoftwareDistribution_old to the folder and then press Enter.
  7. Restart your system.
  8. Re-enable the Automatic Updates option from the System Properties dialog box.
  9. Run Windows Automatic Updates again to update your Windows computer.