Cannot Upgrade Ubuntu Linux Directly from DVD At All?

[Teo En Ming]

The installer says:

"This computer currently has no detected operating systems. What would
you like to do?"

Shouldn't the installer detect a previous installed version of Ubuntu Linux?

Yours sincerely,

Subtle Denial of Medical Treatment by the Singapore Government for Mr.
Teo En Ming (Zhang Enming)
Link: https://www.scribd.com/doc/258700156/Subtle-Denial-of-Medical-Treatment-by-the-Singapore-Government-for-Mr-Teo-En-Ming-Zhang-Enming