I know this has been posted a bunch. I have read through a BUNCH of forums and Microsoft support questions on this and nothing has worked, yet. My mom wanted a pc upgrade recently because the one she has been using couldn't keep up with tabs and applications open. So, I had upgraded her build with a new Bios (UD A320M-S2H rev.3), cpu (AMD Athlon 3000G) 16 gb of Ram (G.Skill). That's pretty much everything for the upgrade. Now, I had installed all of that without a hitch and as soon as I enter Windows 7 my mouse and keyboard do not do anything, In the Bios they worked perfectly fine. I updated my Bios to the most recent version (F2), I tried the P2 connection to no avail, Turned off legacy support on and off too. She has work files on the drive so, I am not trying to create a new disc image and re install files or anything that might cause files to be deleted. At this point I think it is the windows 7 drivers for USB that need to be installed on to the MOBO but which ones and where from.