diff --git a/BizHawk.Client.Common/SharpCompress/Compressors/Rar/UnpackV2017/unpack_hpp.cs b/BizHawk.Client.Common/SharpCompress/Compressors/Rar/UnpackV2017/unpack_hpp.cs
index 8586c98baa..c15d9bb951 100644
--- a/BizHawk.Client.Common/SharpCompress/Compressors/Rar/UnpackV2017/unpack_hpp.cs
+++ b/BizHawk.Client.Common/SharpCompress/Compressors/Rar/UnpackV2017/unpack_hpp.cs
@@ -186,13 +186,13 @@ struct UnpackThreadData
 //struct UnpackFilter30
     internal class UnpackFilter30
 {
-  public uint BlockStart;
-  public uint BlockLength;
-  public bool NextWindow;
+  //public uint BlockStart;
+  //public uint BlockLength;
+  //public bool NextWindow;
 
   // Position of parent filter in Filters array used as prototype for filter
   // in PrgStack array. Not defined for filters in Filters array.
-  public uint ParentFilter;
+  //public uint ParentFilter;
 
 /*#if !RarV2017_RAR5ONLY
   public VM_PreparedProgram Prg;
diff --git a/BizHawk.Client.Common/SharpCompress/Compressors/Rar/VM/BitInput.cs b/BizHawk.Client.Common/SharpCompress/Compressors/Rar/VM/BitInput.cs
index 825759123c..594550803a 100644
--- a/BizHawk.Client.Common/SharpCompress/Compressors/Rar/VM/BitInput.cs
+++ b/BizHawk.Client.Common/SharpCompress/Compressors/Rar/VM/BitInput.cs
@@ -11,7 +11,7 @@ namespace SharpCompress.Compressors.Rar.VM
 // TODO: rename var
         public int InAddr { get { return inAddr; } set { inAddr = value; }  }
         public int InBit { get { return inBit; } set { inBit = value; }  }
-        public bool ExternalBuffer;
+		public bool ExternalBuffer = false;
 
 
         /// <summary>  </summary>
diff --git a/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZIndex.cs b/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZIndex.cs
index 736f978af5..6484ce0b56 100644
--- a/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZIndex.cs
+++ b/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZIndex.cs
@@ -7,7 +7,7 @@ using SharpCompress.IO;
 
 namespace SharpCompress.Compressors.Xz
 {
-    [CLSCompliant(false)]
+    //[CLSCompliant(false)]
     public class XZIndex
     {
         private readonly BinaryReader _reader;
diff --git a/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZIndexRecord.cs b/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZIndexRecord.cs
index f0ee443e65..aa17fc368d 100644
--- a/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZIndexRecord.cs
+++ b/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZIndexRecord.cs
@@ -3,7 +3,7 @@ using System.IO;
 
 namespace SharpCompress.Compressors.Xz
 {
-    [CLSCompliant(false)]
+    //[CLSCompliant(false)]
     public class XZIndexRecord
     {
         public ulong UnpaddedSize { get; private set; }
diff --git a/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZStream.cs b/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZStream.cs
index df755c2680..473789e363 100644
--- a/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZStream.cs
+++ b/BizHawk.Client.Common/SharpCompress/Compressors/Xz/XZStream.cs
@@ -3,7 +3,7 @@ using System.IO;
 
 namespace SharpCompress.Compressors.Xz
 {
-    [CLSCompliant(false)]
+    //[CLSCompliant(false)]
     public sealed class XZStream : XZReadOnlyStream
     {
         public static bool IsXZStream(Stream stream)