Hi,

Thanks. It sounds like it is having startup problems. Generally it is a very simple system so there can not be that much to go wrong. Normally Questions..

1)
One thing to do it to switch on the Trace in the vm options. This will create a txt trace file in your Visual Micro program folder. Pls submit the contents of the trace after re-starting visual studio

2)
If you selected File>New>Arduino Project and enter "TestSketch" as a name, add a void setup() then select a board and press F5 what error to you get or what text in which output window is displayed?

3)
Can you confirm that you see what looks to be all libraries on "Project>Add Arduino Library>User" and "Project>Add Arduino Library>Core"

4)
Please confirm what happens when you try to compile sketch "w" using the arduino ide

5)
When you say that you also opened an old project. I assume you mean an old .pde? If so was the current visual studio solution empty or closed at the time? and if so did Visual Studio ask if you wanted to create a project for the sketch?

6)

if you open visual studio empty and then use "File>Open File" to open your w.pde file does it prompt to open the "w" project? Does the w.pde exist in the w project folder? If it doesn't exist this also points to some startup problems.

7)

Do you have C++, C# and VB.NET languages installed in Visual Studio?

8)

Are you using Visual Studio SP1

9)

What other addins and extensions do you have loaded?

10)

Does the current user have registry permissions? Can you start VS with admin rights to see if there is a difference.

ok i solved that too.
They have a relax version of arduino IDE, because they say their code is too big. When I use this with VIsualMicro, i gives the compile errors. But the normal Arduino does it.
Of course, they hacked the program so it is prone to having problems...

Well, like I said , i hope it stays like this, working...
Thank you very much again, and great job.

I'll be back if anything

Good to hear it is all working. For other users who might read this was the reason for the problem...

One other thing to note is that after your reset, the Visual Studio devenv.exe process was probbaly hanging around. 

You would see it in task manager > processes. It would need to be closed to ensure a clean Visual Studio start which is probably what happened  today hence things are now working.

Re-booting your machine is the other way to see a clean start. 

Once you are up and running it should not be a problem anymore.