Hello Guys.. sometimes my PC won't start and a black screen and the top corner is showing and - mark .. Why this is happening ? and after restarting two or three times ,it get back to normal is this happen with others too..
This can be a number of things, Hard drive going bad to video card going out...Check all your plugins.. Are there any errors?
When you say the system won't start, could you clarify? Is it not powering on (going through POST with the usual beeps) or are you not getting to the desktop?