diff --git a/_.cpp b/_.cpp
index d089037..1df4b06 100644
--- a/_.cpp
+++ b/_.cpp
@@ -1,18 +1,18 @@
 /* Check cf5-opt.vim defs.
-VIM: let g:lcppflags="-std=c++11 -O2"
-VIM: let g:cppflags=g:boost.g:tbb.g:tbbmalloc.g:tbbmproxy
-VIM: let g:ldlibpath=g:boostld.g:tbbld
-VIM: let g:cf5output=0
+VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
+VIM: let g:wcppflags="/O2 /EHsc /DWIN32"
+VIM: let g:cppflags=g:Iboost.g:Itbb
+VIM: let g:ldflags=g:Lboost.g:Ltbb.g:tbbmalloc.g:tbbmproxy
+VIM: let g:ldlibpath=g:Bboost.g:Btbb
+VIM: let g:argv=""
+VIM-: let g:cf5output=0
 */
 #include <iostream>
 #include <exception>
 
-
-
 int main ( void )
 {try{
 
-
 	return 0;
 }
 catch ( const std::exception& e )
diff --git a/cf5-opt.vim b/cf5-opt.vim
index 53bebb8..0c9d02c 100644
--- a/cf5-opt.vim
+++ b/cf5-opt.vim
@@ -6,26 +6,55 @@ function! s:SetUpLibrariesLinux()
 	"
 	"	BOOST
 	"
-	let g:boostdir=g:srcdir . "/boost_1_53_0"
+	let g:boostdir=g:srcdir."/boost_1_53_0"
 	let g:boostinc=g:boostdir
-	let g:boostlib=g:boostdir . "/lib-amd64/lib"
-	let g:boostld=":".g:boostlib
-	let g:boost=" -I".g:boostinc." -L".g:boostlib"
+	let g:boostlib=g:boostdir."/lib-amd64/lib"
+	let g:boostbin=g:boostlib
+	let g:Bboost=g:boostbin.":"
+	let g:Iboost=" -I".g:boostinc
+	let g:Lboost=" -L".g:boostlib
 	"
 	"	Intel TBB
 	"
-	let g:tbbdir=g:srcdir . "/tbb41_20130116oss"
-	let g:tbbinc=g:tbbdir . "/include"
-	let g:tbblib=g:tbbdir . "/lib/intel64/cc4.1.0_libc2.4_kernel2.6.16.21"
-	let g:tbbld=":".g:tbblib
-	let g:tbb=" -I".g:tbbinc." -L".g:tbblib." -ltbb"
+	let g:tbbdir=g:srcdir."/tbb41_20130116oss"
+	let g:tbbinc=g:tbbdir."/include"
+	let g:tbblib=g:tbbdir."/lib/intel64/cc4.1.0_libc2.4_kernel2.6.16.21"
+	let g:tbbbin=g:tbblib
+	let g:Btbb=g:tbbbin.":"
+	let g:Itbb=" -I".g:tbbinc
+	let g:Ltbb=" -L".g:tbblib." -ltbb"
 	let g:tbbmalloc=" -ltbbmalloc"
 	let g:tbbmproxy=" -ltbbmalloc_proxy"
 
 endfunction
 
 function! s:SetUpLibrariesWindows()
-	call s:SetUpLibrariesLinux()
+	"
+	"	the root of all 3pty libraries
+	"
+	let g:srcdir=$HOME . "\\src"
+	"
+	"	BOOST
+	"
+	let g:boostdir=g:srcdir."\\boost_1_53_0"
+	let g:boostinc=g:boostdir
+	let g:boostlib=g:boostdir."\\stage\\win64_vc12\\lib"
+	let g:boostbin=g:boostlib
+	let g:Bboost=g:boostbin.";"
+	let g:Iboost=" /I\"".g:boostinc."\""
+	let g:Lboost=" /LIBPATH:\"".g:boostlib."\""
+	"
+	"	Intel TBB
+	"
+	let g:tbbdir=g:srcdir."\\tbb41_20121003oss"
+	let g:tbbinc=g:tbbdir."\\include"
+	let g:tbblib=g:tbbdir."\\lib\\intel64\\vc11"
+	let g:tbbbin=g:tbbdir."\\bin\\intel64\\vc11"
+	let g:Btbb=g:tbbbin.";"
+	let g:Itbb=" /I\"".g:tbbinc."\""
+	let g:Ltbb=" /LIBPATH:\"".g:tbblib."\" tbb.lib"
+	let g:tbbmalloc=" tbbmalloc.lib"
+	let g:tbbmproxy=" tbbmalloc_proxy.lib"
 endfunction
 
 function! SetUpLibraries()
diff --git a/tbb_task_scheduler_init.cpp b/tbb_task_scheduler_init.cpp
index c236f39..2c44bd9 100644
--- a/tbb_task_scheduler_init.cpp
+++ b/tbb_task_scheduler_init.cpp
@@ -1,7 +1,8 @@
 /* Check cf5-opt.vim defs.
-VIM: let g:lcppflags="-std=c++11 -O2"
-VIM: let g:cppflags=g:tbb." -ltbbmalloc -ltbbmalloc_proxy"
-VIM: let g:ldlibpath=g:tbbld
+VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
+VIM: let g:cppflags=g:Iboost.g:Itbb
+VIM: let g:ldflags=g:Lboost.g:Ltbb.g:tbbmalloc
+VIM: let g:ldlibpath=g:Bboost.g:Btbb
 */
 #include <tbb/enumerable_thread_specific.h>
 #include <tbb/task_scheduler_init.h>
@@ -10,11 +11,20 @@ VIM: let g:ldlibpath=g:tbbld
 #include <exception>
 #include <vector>
 
+/*
+ * 	Conclusion:
+ * 		The first task_sheduler_init is configuring number of threads in
+ * 		the thread pool. If the task scheduler initialised implicitly then
+ * 		the number of threads is the number of cores. To ensure uncomment
+ * 		the commented line below.
+ */
+
 int main ( void )
 {try{
 
-	std::vector<int> v(1024*1024*1024);
-	tbb::task_scheduler_init init3(20);
+	std::vector<int> v(1024*1024);
+	//tbb::enumerable_thread_specific<int> count;
+	tbb::task_scheduler_init init3(5);
 	tbb::task_scheduler_init init(10);
 	tbb::task_scheduler_init init2(1);
 	tbb::enumerable_thread_specific<int> count;
diff --git a/test_copy_assignement_override.cpp b/test_copy_assignement_override.cpp
new file mode 100644
index 0000000..8792aa7
--- /dev/null
+++ b/test_copy_assignement_override.cpp
@@ -0,0 +1,84 @@
+/* Check cf5-opt.vim defs.
+VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
+VIM-: let g:cppflags=g:Iboost.g:Itbb
+VIM-: let g:ldflags=g:Lboost.g:Ltbb.g:tbbmalloc.g:tbbmproxy
+VIM-: let g:ldlibpath=g:boostld.g:tbbld
+VIM-: let g:cf5output=0
+*/
+
+/*
+ * 	Conclusion:
+ * 		Per C++ standard since Son doesn't have explicitely defined copy
+ * 		assignement operator the an implicite one is generated which call
+ * 		Base::operatro = () as a result overriden operator in the Son is not
+ * 		called.
+ */
+
+#include <iostream>
+#include <exception>
+
+class Base 
+{ 
+public: 
+	int b;
+
+virtual Base &operator=(const Base & o) 
+{ std::cout << "Base" << std::endl; b=o.b; return *this; }; 
+}; 
+
+class Derived : public Base 
+{ 
+public:
+   int d;
+
+virtual Base &operator=(const Base &)
+{ std::cout << "Derived 1" << std::endl; return *this;}; 
+
+virtual Derived &operator=(const Derived &)
+{ std::cout << "Derived 2" << std::endl; return *this;}; 
+}; 
+
+class Son : public Base 
+{ 
+public:
+   int d;
+
+virtual Base &operator=(const Base &)
+{ std::cout << "Son" << std::endl; return *this;}; 
+
+}; 
+
+
+int main ( void )
+{try{
+
+	Derived d1, d2;
+	d1.b = 0;
+	d2.b = 1;
+	d1.d = 0;
+	d2.d = 1;
+	Base * b1 = &d1;
+	Base * b2 = &d2;
+	*b1 = *b2;
+	std::cout << d1.b << d1.d << std::endl;
+
+	d1 = d2;
+	
+	Son s1, s2;
+	s1 = s2;
+
+	return 0;
+}
+catch ( const std::exception& e )
+{
+	std::cerr << std::endl
+			<< "std::exception(\"" << e.what() << "\")." << std::endl;
+	return 2;
+}
+catch ( ... )
+{
+	std::cerr  << std::endl
+			<< "unknown exception." << std::endl;
+	return 1;
+}}
+