Question Windows 7 dvd not working

Sep 30, 2020
1
0
10
0
Please help me
I have dell core i2 512 mb ram it is running Windows 7 enterprise I want to change it into window 7 ultimate but when I insert a Windows 7 dvd in it the cd rom detect the cd but it always show that this dvd have 0 bytes free and 0 bytes used. Please help
 

ASK THE COMMUNITY