I upgraded to Win 10 on thursday night. Came into office on friday am all seemed to be fine then about 2 hours later no internet. This is a HP tower with a wired connection to a network. Old xp is also connected and not affected. WIFI is fine(on my laptop right now. This is the computer that does everything and will not connect. I have have tried every fix I can find on line. Right now I just want to go back to 7 but that is not an option as I cannot connect. does anyone have a useful fix for this? Otherwise this computer is useless and bussiness will suffer.really regretting doing the upgrade. !!!!!!