Ok a friends computer today, was being really slow accessing the internet. So she pushed ctrl-alt-del and task manager took forever to come up then went into some security thing and then they restarted the computer. After that the computer is taking forever to boot up if at all. When it does stop spinning on the loading screen. It goes to a blank black screen with a mouse pointer. I tried the methods suggested in most forums. Log in , then windows key + p, then down arrow twice, enter etc. Doesn't seem to work. She managed to get something to pop up once with a winpishl.exe but if you close that out, it freezes everything. So I had an older win 10 bootable usb from when it first came out that I tried using. I got to the screen where it says install or click here for repair, whenever I click repair it then goes to a blue blank screen with a moveable mouse pointer. But I cant seem to get past that. Ive hooked up multiple monitors, disconnected everything except for a mouse, keyboard and monitor, I tried installing unbuntu, but it wont bring up the install for unbuntu for some reason. I am more or less at a loss for what to do other than click on install new windows, but I don't want to do that, and also it might present me with the same blue screen. Anyone have any suggestions?