Black screen and no F8 option pls help

leifo

Honorable
Dec 24, 2012
51
0
10,630
Hello,I have Windows 7 and a ASUS P8Z77-V motherboard,so when I boot the computer up it apprear to look normal,I'm able to put my log in password and once I do that it loads into a black screen with a movable mouse and I'm also able to hit control-alt-delete for the task manager,iv read a few solved threads about this issue and most of them require to install the OS again which I can't find or burn the iso which I can't since this is my only computer.pls help Thx