What is a TempPE folder?

[bestdev]

Question: Is there any difference between a PE file and a .NET-exe file? Do both contain MSIL Code? Where can I find PE files? Where and when are they created?

Answer:

PE stands for portable format. This format describes the internal structure of the binary file.

PE files initially where binary modules (.dlls, .exes ). Information stored in
the file was described with the set of PE headers ( winnt.h ). This
information is used by windows loader, when it is loading module into
memory.

.NET assemblies are also PE compatible. But in the .NET assembly PE header contains information that this file is not an unmanaged module but .NET assembly. This helps loader to correctly load the file. In case of .NET
assembly CLR is started and completes further load of an assembly.

[bestdev]

Managed executables (.NET-exe as you call them) use the PE format, and so does regular native Win32 executables. So in a way there's no difference, .NET executables are simply one kind of PE files.