S.M.A.R.T
Start - All Programs - Accessories - Right click Command Prompt and choose Run As Administrator. Type (or copy and paste by right clicking in the Command Prompt window and choosing Paste).
Disk drives in Windows monitor themselves for impending failure. The feature is called S.M.A.R.T. It will detect impending failure 30% of the time. In an elevated command prompt type (it's one line)
wmic /namespace:\\root\wmi PATH MSStorageDriver_FailurePredictStatus get active,predictfailure,reason /format:List
If it's on Active will be true, if not on turn it on in the computer's BIOS.
Predict Failure should be False if everything's ok.
In Vista and later if SMART predicts failure Windows prompts the user to run Backup.
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