Hi Laura ,
Welcome to Justanswer ..
It will be better and quick if I can access your computer remotely to fix the problem ..
To do that please follow the below steps
1)Please open the below link URL in browser
2)Then click on I agree button at the bottom of the page .
3)After that click on Download link to download a file and run it
Hello Laura, and thank you for choosing JUSTANSWER.com
Windows 10, needs to DOWNLOAD to your computer, and i do believe that your running out of HARD DRIVE SPACE.
You need to delete files from your C:/ Drive, and free up about 10GB of space to be able to UPGRADE to Win10
You may want to uninstall the KB3035583 update and then reinstall it through the Windows Update. Then check for the issue has been solved or persists?
Your computer also needs to meet the System Requirements for Windows 10, as this may also give a LOW MEMORY issue, as a glitch.
Requirements for Windows 10: