can i make an os using visual basic??/

No,

Visual Basic requires the .NET Common Runtime Libraries from Microsoft and as these are not available from the start a VB.NET OS would be missing Most/All required Components

No.

the .NET framework itself is written in C++ (C and C++ are whats used mainly for operating systems, some assembley too)

C and other unmanaged languages are used for the O/S as it compiles to machine code (binary) not an intermediate language to be interpreted (as is the case for .net and java)

Manages languages like .NET are also much much slower than say, C

No that is not possible.
Again it is not possible to write an OS using a single language.

Again it is not possible to write an OS using a single language.

yes it is. Its not possible to write an OS in a managed language like java or .net though

i have created an os in vb.Net and it works! These posts are all nonsense u can create an os om VB .Net

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