Hi all: I recently installed Ubuntu 14.04 as a second OS on my Toshiba Satellite laptop. Long story short, I can no longer boot into Windows 7. I turn on my computer, select Win7 from GRUB, but the screen freezes at the Starting Windows screen. Similarly, when I try and boot into safe mode, it freezes right after loading aswRvrt.sys. I've decided to restore my PC to factory settings. So, I put in my recovery USB, boot from it, and am shown the system recovery options. I select the reset to factory setting option on the bottom of the list, and a dialog pops up. Here's the problem - the two reset options are grey'ed out, and the only click-able action in the list is "Exit Now." Why is this, and how do I fix it?