I put full backup img on my external HDD.Need help

[greenwizard]

My problem is if I restart with HDD on,it freezes when windows logo pops up during startup.What is causing this?
I have a bunch of saved stuff on the external besides the backup img.Its a 500gb.It still froze when I only had 10gb saved on it.
Will it delete everything I have saved on my external if I boot the img?
I have a extra 20gb laying around,it is large enough to hold my saved backup.

 

[whs]

That sounds like a hardware problem. Did you ever try it on another PC.

 

[Sub Styler]

By boot the img i assume you mean write that Image over your internal drive. That will not erase any data on the external. But will wipe the internal.

You should be able to boot without the drive connected and then plug it in afterwards. (i have this issue booting with my ipod connected)