That option is ONLY to be used if you no longer want to use Vista or Windows 7, just XP.
What were you trying to do ?
EasyBCD 1.7 doesn't contain W7 support (it pre-dates W7), so it talks of the "Vista" bootloader.
W7 uses the same bootloader, so latest versions of EasyBCD, say "Vista/7"
Do you have a working XP system ?
If so, you can use EasyBCD (get the latest build) to "reinstall Vista/7 bootloader" as per the instructions here.
If you don't have a working OS, boot your W7 DVD, select "repair your computer" then "startup repair"
do the above line 3 times (it has several things to fix now you've thrown away the whole W7 bootload process, and can only fix one thing per boot)