Your welcome John.
Hard drives like most hardware can fail the first time used or last +10 years.
The rule of thumb for HDs is if it doesn't fail in the first 6 months they usually last for several years, (but not always!).
The newer HDs have S.M.A.R.T.
, Self-Monitoring, Analysis, and Reporting Technology, which is suppose to warn you when they're going bad. A warning window will come up when it detects something.
Each manufacturer has their own software to check the hard drive, all it really tells you is that it's ok or not ok at this moment in time. Tomorrow is a different day.
Go to your hard drive website and look for the hard drive diagnostics tools.
For Seagate it is SeaTools
Enterprise and Ultimate are very close, not sure if you can just put the Ultimate key in the enterprise version. Might try it, just did a search and couldn't find a definitive answer.
Most experienced users will format the partition before or during the new installation, it keeps any corrupt files from staying on the new installation.
You can use Windows Easy Transfer - Transfer To & From Computers
which will make the Clean installation a little easier. You will still have to install all of your programs, but your user accounts and personal files can be transfered.
Let me know if you have any other questions.