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Sony VAIO is not permiting to install fresh win 7 from dvd
hi
i have Sony vaio model VPCEA390X , it came with win 7 home edition but now i wanted to install win 7 professional edition.
The problem is when i insert win 7 bootable DVD into the DVD drive , the DVD is not booting , i tried total 3 DVDs but no use .
when checked my BIOS settings they are as follows :
Primary Boot Device - Optical Drive
Secondary Boot Device - Hard Drive
At last i tried to install win 7 from USB Flash Drive , but there is no Boot from USB Flash Drive option in my BIOS settings
Please suggest me how to install win 7 in my lap
thanking you.