The Windows 10 update is rolling out now, but some users are reporting an 80240020 error which is preventing the installation for proceeding. Here’s how to fix it.

The Windows 10 upgrade has started rolling out and already some users are reporting problems with installing the update. An 80240020 error has cropped up, meaning that the Windows 10 installation folder is unfinished or corrupted. If you get this error you won’t be able to proceed with the install.

Fortunately, the fix is simple.Redditor Losemind has posted the following instructions for how to quickly and easily resolve the 80240020 error.
1. Go into “C:WindowsSoftwareDistributionDownload” and delete everything in that folder.
2. Now, run the command prompt as an administrator. Type in “wuauclt.exe /updatenow”.
3. Go to your Control Panel > Windows Update and your Windows 10 should start re-downloading from scratch, hopefully without flaws this time.

Another option, if the error persists is to create your own installation media on a USB or DVD, then do a manual install. Follow the instructions below to download Windows 10 manually and install it from your own physical media.

Before you begin

·         Make sure you have:

·         An internet connection (internet service provider fees may apply).

·         Sufficient data storage available on a computer, USB or external drive for the download.

·         A blank USB or DVD (and DVD burner) with at least 4 GB of space if you want to create media. We recommend using a blank USB or blank DVD, because any content on it will be deleted.

·         Read the  System Requirements .

·         If you will be installing the operating system for the first time, you will need your Windows product key (xxxxx-xxxxx-xxxxx-xxxxx-xxxxx). For more information about product keys and when they are required, visit the  FAQ  page.

·         For Enterprise editions please visit the  Volume Licensing Service Center .

Use the media creation tool to download Windows. This tool provides the best download experience for customers running Windows 7, 8.1 and 10. To learn how to use the tool, go to the Installing Windows 10 using the media creation tool  page. Tool includes:

  • File formats optimized for download speed.
  • Built in media creation options for USBs and DVDs.
  • Optional conversion to ISO file format.




Source: How To Fix Windows 10 80240020 Installation Error