For the last week, my main account profile gets a black screen after startup.  After several minutes of a black screen, it will say error.  Once this week I was able to play, however it took over 5 minutes to get to the red Mojang screen.  I am able to play with the other profiles that I have, but I don't want to play on them.  

• I have updated software
• backed up game
• checked for corrupt data 
• deleted profiles
• The one time I got on I deleted world to make room