Make sure that your device has enough space. If these steps don’t work, see Resolve Windows 10 upgrade errors for more detailed technical info. If you see any of these error codes, try the following steps first to fix the problem. 0xC1900101 ErrorsĪn error that begins with 0xC1900101 is usually a driver error.
If it looks like your drive is running low on space, see Tips to free up drive space on your PC. You’ll see the amount of available space under the drive. If there are multiple drives listed, the system drive is the drive that includes a Microsoft Windows logo above the drive icon. Then select Computer or This PC and look under Hard Disk Drives or under Devices and drives. To view how much hard drive space is available on your computer, select the Start button, then in the search box on the taskbar, type File Explorer (known as Windows Explorer in Windows 7).
To upgrade to Windows 10, you need enough space on your hard drive for the installation to take place.
