Best way to transport laptop on bike?

[AgentK]

So I have been commuting to work with laptop in backpack.
Nothing wrong with it (I think), but with all the topboxes, panniers and tankbags out there,  just started to wonder:
What is the best / safest mode of transport for a laptop on a bike (and I have no option but to carry it with me!)

Any advice?

 

[Winston]

 

[PierreO]

 

[HermanH]

 

[Eisbein]

 

[Rooies]

 

[Carrots]

 

[AgentK]

 

[Buzzlightyear]

 

[JohnnyGS]

 

[Tintin]

 

[Kola?]

 

[AntVan]

 

[Tintin]

 

[AntVan]

 

[Piston Pete]

 

[Fuzzy Muzzy]

 

[Fuzzy Muzzy]

 

[AntVan]

 

[Buks]