programs, files on a dvd will not open

Hello,
My computer went into the shop and they had to put in a new windows program. all my files have been converted to LO. Desktop LO files will open but nothing on a dvd will open. I no longer have Word.
Yesterday I was able to open some of LO main programs but today none of them will open.

Thank you for your assistance.

I think before trying to resolve DVD issues we should try to understand why LibreOffice won’t open. Can you describe the errors or symptoms a bit more when trying to open LO on it’s own? What version, language of LibreOffice, and version/language of operating system? Have you rebooted Windows since yesterday or just used sleep/hibernate?