Carrying your computer in your hand can be cumbersome, use a computer bag instead. Maybe not a good choice if you prefer lots of colour choices, but it does come in black.
From Ecprof
NPACC11029 - 15.6 ABG950 BACKPACK BLACK MOUSE
ShopBetter24
Laptop Backpack Acer NP.ACC11.029
Shopaide
Laptop Backpack Acer NP.ACC11.029