gigabyte mobo boot problem

ekymetal

Honorable
Apr 28, 2013
3
0
10,510
Hi all
This is my first post ,cheers from Tasmania !:D
Hope you can help with my problem .
Here is my specs

6 gig ddr3 ram corsair xms 3
intel core 2quad CPU q9550 2.83 ghz
Gigabyte mb ga-ep45t-ds3r motherboard
Gigabyte Radeon HD 4850 1GB Passive cooler
All in a sidewinder case
I am running windows 7 ultimate , which is on a 80 gig drive .

I recently added a 2tb drive to my system .
I also have a wd external drive ,(my passport ).Recently added .
After i added these i now have a boot problem .
I have managed to get it to boot ,by disconnecting everything except my operating system hdd .
I have not turned it off since ,only let it go to sleep .
I am new to building ,and this is my first build .
Could any of these have changed my boot order ?
Sorry if this is a stupid question ,but i joined this forum to learn !
Any help would be appreciated !
cheers