+/**\r
+ Writes a value to Control Register 4 (CR4).\r
+\r
+ Writes and returns a new value to CR4. This function is only available on\r
+ IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.\r
+\r
+ @param Cr4 The value to write to CR4.\r
+\r
+ @return The value written to CR4.\r
+\r
+**/\r