Saint Jack This is not what you came looking for, but it is what you might need.
You will not re-format the drive, but rather replace it entirely. Go buy an SSD drive (basically a giant flash drive, no moving parts). A local computer shack (not an electronics store!) kid will connect it to our machine, and using the bundled migration software they will mirror the full content, bit by bit, of the old drive onto the new one. Then power down and make a physical swap.
The machine won't tell the hardware difference, and the speed you'd get will knock you off the chair. It will not solve the problem of your W7 installation being due to re-install, but the symptoms will be hidden due to the sheer data transfer power of the new device.
Yes, it can be done on a laptop too, it is a matter of no more than 16 screws in and out. While the case is open, by the sound of your trouble you would greatly benefit from increasing the operational memory (RAM) with an additional slot-in module (provided the socket is there).
Total cost?
256 GB SSD (do not go for smaller) below 70 USD with tax
(you do want the MX500 line)
work: about 14 USD
memory, it kind of depends. See the boilerplate of your notebook and google away. Or send a picture.