--- a/mozglue/build/WindowsDllBlocklist.cpp
+++ b/mozglue/build/WindowsDllBlocklist.cpp
@@ -183,16 +183,19 @@ static DllBlockInfo sWindowsDllBlocklist
 
   // NetOp School, discontinued product, bug 763395
   { "nlsp.dll", MAKE_VERSION(6, 23, 2012, 19) },
 
   // Orbit Downloader, bug 1222819
   { "grabdll.dll", MAKE_VERSION(2, 6, 1, 0) },
   { "grabkernel.dll", MAKE_VERSION(1, 0, 0, 1) },
 
+  // ESET, bug 1229252
+  { "eOppMonitor.dll", ALL_VERSIONS },
+
   { nullptr, 0 }
 };
 
 #ifndef STATUS_DLL_NOT_FOUND
 #define STATUS_DLL_NOT_FOUND ((DWORD)0xC0000135L)
 #endif
 
 // define this for very verbose dll load debug spew