I'm assuming you're using Windows so get your HDD back, install Macrium Free cloning software, if you don't have one buy an external hard drive to save the cloned partitions or disk, and you should be on your way. https://www.macrium.com/reflectfree
Another option is to use Clonezilla, but that does require a bit more technical skill but it's completely free. You'll need a thumb drive to boot to Clonezilla. You can find "How To" videos on Youtube for both these products.
Once you learn how to use your cloning software, always keep a copy of your cloned system saved. It will keep you from suffering data losses and the headaches that go with them. Like you may be about to experience.