|Before you go any further I suggest you verify that your computer BIOS is capable of configuring a 1TB hard drive. Due to the capacity of the original drive I suspect that your computer may not be 48 bit LBA compatible. If that is the case you will have issues with data loss or corruption.|
Watch the POST screens at start up to verify the BIOS if properly identifying the new drive by both the model number and the FULL capacity. Post back what you see reported there.
If you have a more modern system but were just using an older hard drive then this may not be an issue.