Error Code C19000101 - 2000B on Windows 10– What is it?
Error Code C19000101 - 2000B is a Blue Screen of Death (BSOD) error encountered by Windows users in an attempt to upgrade their operating system from Windows 7 or Windows 8/8.1 to Windows 10. The system upgrade does not successfully finish and when the installation is resurrected, it fails then reverts back to the original operating system. More and more Windows users come across this error that may have been triggered by a few reasons to be discussed in this article.
Solution
Error Causes
Microsoft users can experience the BSOD error C19000101-2000B due to the following reasons:
- There’s an incompatibility with the drivers
- Antivirus software
Further Information and Manual Repair
In fixing error code C19000101-2000B, you can try doing it manually. Manual repair methods can offer users solutions effectively and efficiently, having to address the root causes and issues in relation to a number of Windows error codes. If properly implemented, these manual repair methods can help Windows users resolve problems at hand immediately. However, there are cases where the help of a Windows professional is necessary. In such instances, it would be best to consult a certified Windows expert or you can also try using a powerful automated tool whenever needed.
To be able to fix error code C19000101-2000B, implement the first method used in resolving error code 0xc000021a, then you can proceed with this first method:
Method One: Perform Clean-Boot
- Prior to performing an upgrade, you need to disable your antivirus. Or, better yet, uninstall it.
- Ensure that your PC name is simple without hyphens, periods, or dashes.
- Restart your device several times, then try again.
- Disable all USB devices such as a smart card reader.
- If you are using a SCSI hard disk, be sure to have the drivers ready and available for a storage device like a thumb drive to be connected. While on the Windows 10 setup, select the Custom Advanced Option then use the Load Driver command to load the right driver for the SCSI drive. If the setup still fails, try switching to an IDE-based hard disk.
- Launch a clean boot, restart your device, then try again.
- If you are upgrading to Windows 10 using the .ISO file, make sure to disconnect from your internet connection during setup. If your device is connected by Wi-Fi or through LAN, you need to disable both before attempting to run a system upgrade again.
- Switch to a local account if you are connected to a domain.
- Ensure that all external devices such as USB keys, external hard drives, gaming controllers, or printers are not attached to your device.
If you are upgrading to Windows 10 using Windows Update, you can perform a manual repair using the next method.
Method Two: Upgrading Via Windows Update
- Make sure to disconnect from the Wi-Fi or LAN once the download reaches 100% before you proceed with the system upgrade.
- Press Windows + X to open the command prompt window as an administrator.
- Stop the Windows Update service, BITS, MSI Installer, and Cryptographic by inputting the following commands one by one, hitting Enter after every command:
Net stop wuauserv
Net stop bits Net stop msiserver Net stop cryptSvc
- Restart both Software Distribution and Catroot2 folders. You can do this by typing Ren C: WindowsSoftwareDistribution SoftwareDistribution.old and Ren C: WindowsSystem32catroot2 Catroot2.old in the command prompt to change the names of both Software Distribution and Catroot2 files.
- Restart the Windows Update service, BITS, MSI Installer, and Cryptographic by inputting the following commands one by one, hitting Enter after every command:
Net start wuauserv
Net start bits Net start msiserver Net start cryptSvc
- Exit the command prompt then restart your device. You can now try to proceed with the system upgrade again.
Method Three: Disable or Uninstall Antivirus
- If you opt to just disable your antivirus, you just have to right-click on the antivirus’ icon from your toolbar then choose Disable.
- Press Ctrl + Alt + Del to open the Task Manager.
- Check if all the files or services linking to your antivirus are turned off.
- If you choose to uninstall your antivirus (which is recommended), open Control Panel.
- Once the Control Panel window is open, select Programs then Uninstall a Program.
- Look for your antivirus on the list, right-click it then choose Uninstall.

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Free Windows eMail client simply called Mail is what was once outlook express. Mail itself has the ability to work with other popular accounts like Google Gmail account, Yahoo, iCloud etc. How it comes with Windows OS and it integrates very well with Microsoft Calendar, this eMail client is for many the first choice.
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All in all, Thunderbird is one great eMail client and it would be a shame not to use it because of its technical side, if you need a reliable and secure eMail client on a single machine, look no further than Thunderbird.
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The final verdict would be that this is perhaps the best eMail client out but the big downside is that there is no desktop version outside the Office suite.
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