Both "Only Ubuntu" or "only Windows 7" are OK, but dual booting always fails...

which laptop are you using?

Acer's laptop uses UEFI and it works fine for me

// It is not mine laptop

ASUS A45V

Did you meet any difficulties?

william.shallum.net/rand...

this might help

thanks, so should i install Win7 First?

yes, in UEFI mode

See, let me try

ESP may need to be enlarged from the default 100MB. I did this after the fact with parted magic: 這個步驟是要作什麼事？

還有他的下面一長串

等等，他說安裝 debian 不要安裝 boot loader 的那個步驟之後要怎麼開機？