WMP11Slipstreamer V0.95 has performed flawlessly on previous uses. Last use approximately a week ago. this indicates that possibly a system change is the root of this problem. I have followed Belarc (CIS) security to increase system security. These changes are not causing any other known problems. This is the reported error can any one offer a possible solution. I would prefer to leave the system at the current security level if possible. Using Windows XP pro SP2. Any assistance with this is appreciated. Thank you. LES WMP11Slipstreamer v0.95 System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidOperationException: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms. at System.Security.Cryptography.SHA256Managed..ctor() --- End of inner exception stack trace --- at System.RuntimeMethodHandle._InvokeConstructor(Object[] args, SignatureStruct& signature, IntPtr declaringType) at System.RuntimeMethodHandle.InvokeConstructor(Object[] args, SignatureStruct signature, RuntimeTypeHandle declaringType) at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Security.Cryptography.CryptoConfig.CreateFromName(String name, Object[] args) at System.Security.Cryptography.PasswordDeriveBytes.set_HashName(String value) at Epsilon.Security.Cryptography.CryptoHelp.CreateRijndael(String password, Byte[] salt) at Epsilon.Security.Cryptography.CryptoHelp.DecryptStream(Stream fin, Stream fout, String password) at WMP11Slipstreamer.CM.DecryptToString(Byte[] Bytes, String Password, Encoding encoder) at WMP11Slipstreamer.Backend.PrepareDependencies() at WMP11Slipstreamer.MainGUI.workerMethod(Object addonSettings) Deleting "C:\1nlite\XP_CD\i386\wmp11temp"... Done! The source being modified has not been damaged. All changes have been successfully reverted