To format a computer means that all your data will be lost. Your operating system, programs, emails, drivers, pictures, everything! All of the updates on your programs will be gone, infarct the every entire program will be gone.
This drop in TSH is an attempt to return circulating thyroid hormone levels to normal. So, a test to measure the amount of TSH in your system will usually show lower than normal TSH when the thyroid is overactive. So, in general, LOWER TSH = OVERACTIVE THYROID / HYPERTHYROIDISM.
Clinical hypothyroidism is when there are definite symptoms with a raised TSH outside the reference range and a low serum thyroxine level. Some patients have few if any symptoms, have a serum TSH outside the reference range, but have serum thyroxine levels within the reference range.