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.
The body produces TSH as a messenger to tell the thyroid to make more thyroid hormone.. So, when your thyroid is already over-producing, the TSH drops to low levels. And when you're hypothyroid, your body keeps making more and more TSH to keep urging the thyroid into production.