I have a dell dimension 9100 desk top and I want to replace the original Hard drive with a the new 2TB hard drive.
Also the OS is Windows XP and I want to change the OS to Windows 7 (I have the CD).
What is the installing process when changing the Hard Drive?

Assuming you want to keep your data, you install the new drive in the same place as the old one, boot from the CD, install Win7. Then, if you can, install the old drive in another slot, or put it in an external drive bay, connect to the system, and copy your files over to the new drive. You will also have to install new versions of most of your applications.

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