reformating and re-installing Windows is seldom the best answer to some tedious glitch. It is usually some setting, mal-ware, or physical damage. There are programs designed to search your drive for crap, and setting designed to keep you from getting more.... and standard practices to set-up a PC safely.

It is impossible to make a quick list, but I suspect that all the re-installing has introduced basic errors (can't find this...hangs on that...etc.)

You may need an **expert** who knows all the 'precise' steps to a clean drive amd safe setup...good luck!