I’ve posted to http://sourceforge.net/projects/csound/ new Windows installers
for version 5.03.01. The download links are as follows.

Double-precision samples:

    
http://prdownloads.sourceforge.net/csound/Csound5.03.01-win32-d.exe?download

Single-precision samples:

    
http://prdownloads.sourceforge.net/csound/Csound5.03.01-win32-f.exe?download

Changes are as follows:

— Removed Loris opcodes, as Loris is not being maintained for Windows, and ATS
opcodes perform similar functions.

— Added numerical constants for M_PI etc. as built-in orchestra macros.

— Ugraded to libsndfile 1.0.17 and LuaJIT 5.1.1 for Windows installers.

— New vaget and vaset opcodes for indexed access to arate variables.

— Added high-resolution versions of trapped.csd and xanadu.csd example pieces.

— Added plugin SDK.