so when i log in to the computer, normally, on the right-bottom, click the arrow, it should show my antivirus, but now, everytime i turn on my PC,its gone, and when i try to open it, it has an error.i dont think its the antivirus's problem....wat should i do??????? and i boot into safe mode, same thing..
I TRIED restore the system, and it had an error...

ALSO, when i want to go into safe mode, i hav to turn the computer off "violently",instead of pressing F8 at the start, cuz when i press F8, sometimes nothing happened, sometimes it beeps loud...