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.
TSH is the main hormone tested by your doctor to determine if your thyroid gland is functioning properly. Too much TSH means the pituitary gland is trying to get a sluggish thyroid gland to work better. Too little means there is enough thyroxin in your body so TSH remains low until more is needed.