Error Installing Adobe Illustrator via Creative Cloud - Super Urgent!

Hello! I'm currently trying to install Adobe Illustrator onto a Windows laptop using Creative Cloud as a matter of urgency - there's an approaching deadline to think about. I keep running into one of two errors:

ERROR: DF024: Unable to move file // Error 32 The process cannot access the file because it is being used by another process..

Try setting correct permissions to the specified file/folder or parent folder, so that admin has rights to modify it.(Seq 2)

Or

FATAL: Error (Code = 146) executing in command 'MoveDirectoryCommand' for package: 'AdobeIllustrator19-Core', version:19.2.1.147

FATAL: Error occurred in install of package (Name: AdobeIllustrator19-Core Version: 19.2.1.147). Error code: '146'

WARN: Failed to move directory 'C:\adobeTemp\ETR22FE.tmp\AdobeIllustrator19-Core\StagingArea_x64\Application\Plug-ins' to 'C:\Program Files\Adobe\Adobe Illustrator CC 2015\Plug-ins'

Now I've scoured message boards, forums and FAQs over the last few days and haven't found anything that either a) explicitly resolves this or b) I actually understand. Can anyone please help? Getting very desperate...

Thanks!