This morning I turned on the laptop and it took twenty five minutes to boot. Started last night with all three browsers, Chrome, Edger and IE freezing and refusing to work. On the desktop...everything slowed to a crawl. Five minutes or better just to open explorer. Then a blue screen comes up and says unmountable boot volume. Googled it and followed the instructions. Boot from the USB choose repair system, that never came up. Hard shut down wait a few seconds and hit the power button again. I pr...