|ok...please quit panicking and calm down...|
Please post how you have connected your hard disk ( using usb cable, IDE Cable etc.)
Also check the device manager for yellow markers:
1.Click on Start and then Control Panel.
2.Click on the System and Maintenance link.
Note: If you're viewing the Classic View of Control Panel, you won't see this link. Simply double-click on the Device Manager icon and then proceed to Step 3.
3.In the System and Maintenance window, click on the Device Manager link near the bottom of the window.
4.Check for yellow markers...