--- a/mozglue/build/WindowsDllBlocklist.cpp
+++ b/mozglue/build/WindowsDllBlocklist.cpp
@@ -242,16 +242,19 @@ static const DllBlockInfo sWindowsDllBlo
   { "idmcchandler5.dll", ALL_VERSIONS },
   { "idmcchandler5_64.dll", ALL_VERSIONS },
 
   // Nahimic 2 breaks applicaton update (bug 1356637)
   { "nahimic2devprops.dll", ALL_VERSIONS },
   // Nahimic is causing crashes, bug 1233556
   { "nahimicmsiosd.dll", ALL_VERSIONS },
 
+  // Bug 1268470 - crashes with Kaspersky Lab on Windows 8
+  { "klsihk64.dll", ALL_VERSIONS, DllBlockInfo::BLOCK_WIN8_ONLY },
+
   { nullptr, 0 }
 };
 
 #ifndef STATUS_DLL_NOT_FOUND
 #define STATUS_DLL_NOT_FOUND ((DWORD)0xC0000135L)
 #endif
 
 // define this for very verbose dll load debug spew