Just built a new PC, can't properly launch windows

[DownloadFailed]

So I just recently finished putting together my new computer. I got new everything except for a gpu and hard drive I took from my old PC. I've installed everything, out turns on fine but the problem is once it's turned on, a windows recovery screen appears, giving me two options:

1 Start windows normally
2 Repair windows (recommended)

I kind of expected this, but I hoped that my HDD that already has windows installed would at least allow me to launch in safe mode, which doesn't work. Any time I try to launch windows in any mode or fashion, it resets itself and I end up back at the recovery screen. I also can't use the repair mode because my old computer had win7 pre-installed on its hdd so I don't have a win7 installation disc. I do, however, have a product key for windows 7 home premium on the tower of the older pc.

My question is, is there anything I can do to actually launch windows on my new computer without going out and getting a new windows7 installation disc?