diff --git a/win32/build/confutils.js b/win32/build/confutils.js
index b72950954c0f7..8a2c88dd639ae 100644
--- a/win32/build/confutils.js
+++ b/win32/build/confutils.js
@@ -1249,16 +1249,12 @@ function SAPI(sapiname, file_list, makefiletarget, cflags, obj_dir)
 		if (PHP_DEBUG != "yes" && PHP_PGI == "yes") {
 			ADD_FLAG('CFLAGS_' + SAPI, "/GL /O2");
 			ADD_FLAG('LDFLAGS_' + SAPI, "/LTCG /GENPROFILE");
-			if (VCVERS >= 1914) {
-				ADD_FLAG('LDFLAGS_' + SAPI, "/d2:-FuncCache1");
-			}
+			ADD_FLAG('LDFLAGS_' + SAPI, "/d2:-FuncCache1");
 		}
 		else if (PHP_DEBUG != "yes" && PHP_PGO != "no") {
 			ADD_FLAG('CFLAGS_' + SAPI, "/GL /O2");
 			ADD_FLAG('LDFLAGS_' + SAPI, "/LTCG /USEPROFILE");
-			if (VCVERS >= 1914) {
-				ADD_FLAG('LDFLAGS_' + SAPI, "/d2:-FuncCache1");
-			}
+			ADD_FLAG('LDFLAGS_' + SAPI, "/d2:-FuncCache1");
 		}
 
 		ldflags += " /PGD:$(PGOPGD_DIR)\\" + makefiletarget.substring(0, makefiletarget.indexOf(".")) + ".pgd";
@@ -1461,15 +1457,11 @@ function EXTENSION(extname, file_list, shared, cflags, dllname, obj_dir)
 			// Add compiler and link flags if PGO options are selected
 			if (PHP_DEBUG != "yes" && PHP_PGI == "yes") {
 				ADD_FLAG('LDFLAGS_' + EXT, "/LTCG /GENPROFILE");
-				if (VCVERS >= 1914) {
-					ADD_FLAG('LDFLAGS_' + EXT, "/d2:-FuncCache1");
-				}
+				ADD_FLAG('LDFLAGS_' + EXT, "/d2:-FuncCache1");
 			}
 			else if (PHP_DEBUG != "yes" && PHP_PGO != "no") {
 				ADD_FLAG('LDFLAGS_' + EXT, "/LTCG /USEPROFILE");
-				if (VCVERS >= 1914) {
-					ADD_FLAG('LDFLAGS_' + EXT, "/d2:-FuncCache1");
-				}
+				ADD_FLAG('LDFLAGS_' + EXT, "/d2:-FuncCache1");
 			}
 
 			ADD_FLAG('CFLAGS_' + EXT, "/GL /O2");
@@ -3064,7 +3056,9 @@ function toolset_get_compiler_version()
 
 	if (VS_TOOLSET) {
 		version = probe_binary(PHP_CL).substr(0, 5).replace('.', '');
-
+		if (version < 1920) {
+			ERROR("Building with MSC_VER " + version + " is no longer supported");
+		}
 		return version;
 	} else if (CLANG_TOOLSET) {
 		var command = 'cmd /c ""' + PHP_CL + '" -v"';
@@ -3105,7 +3099,7 @@ function toolset_get_compiler_name(short)
 		version = probe_binary(PHP_CL).substr(0, 5).replace('.', '');
 
 		if (version >= 1950) {
-			return name;
+			// skip
 		} else if (version >= 1930) {
 			name = short ? "VS17" : "Visual C++ 2022";
 		} else if (version >= 1920) {
@@ -3116,12 +3110,6 @@ function toolset_get_compiler_name(short)
 						When new versions are introduced, adapt also checks in
 						php_win32_image_compatible(), if needed. */
 			name = short ? "VS16" : "Visual C++ 2019";
-		} else if (version >= 1910) {
-			name = short ? "VC15" : "Visual C++ 2017";
-		} else if (version >= 1900) {
-			name = short ? "VC14" : "Visual C++ 2015";
-		} else {
-			ERROR("Unsupported Visual C++ compiler " + version);
 		}
 
 		return name;
@@ -3129,7 +3117,7 @@ function toolset_get_compiler_name(short)
 		var command = 'cmd /c ""' + PHP_CL + '" -v"';
 		var full = execute(command + '" 2>&1"');
 
-		return full.split(/\n/)[0].replace(/\s/g, ' ');
+		ERROR(full.split(/\n/)[0].replace(/\s/g, ' '));
 	}
 
 	WARNING("Unsupported toolset");
@@ -3271,47 +3259,25 @@ function toolset_setup_common_cflags()
 			ADD_FLAG('CFLAGS', ' /RTC1 ');
 		} else {
 			if (PHP_DEBUG == "no" && PHP_SECURITY_FLAGS == "yes") {
-				/* Mitigations for CVE-2017-5753.
-			  	   TODO backport for all supported VS versions when they release it. */
-				if (VCVERS >= 1912) {
-					var subver1912 = probe_binary(PHP_CL).substr(6);
-					if (VCVERS >= 1913 || 1912 == VCVERS && subver1912 >= 25835) {
-						ADD_FLAG('CFLAGS', "/Qspectre");
-					} else {
-						/* Undocumented. */
-						ADD_FLAG('CFLAGS', "/d2guardspecload");
-					}
-				} else if (1900 == VCVERS) {
-					var subver1900 = probe_binary(PHP_CL).substr(6);
-					if (subver1900 >= 24241) {
-						ADD_FLAG('CFLAGS', "/Qspectre");
-					}
-				}
+				/* Mitigations for CVE-2017-5753. */
+				ADD_FLAG('CFLAGS', "/Qspectre");
 			}
-			if (VCVERS >= 1900) {
-				if (PHP_SECURITY_FLAGS == "yes") {
-					ADD_FLAG('CFLAGS', "/guard:cf");
-				}
+			if (PHP_SECURITY_FLAGS == "yes") {
+				ADD_FLAG('CFLAGS', "/guard:cf");
 			}
-			if (VCVERS >= 1800) {
-				if (PHP_PGI != "yes" && PHP_PGO != "yes") {
-					ADD_FLAG('CFLAGS', "/Zc:inline");
-				}
-				/* We enable /opt:icf only with the debug pack, so /Gw only makes sense there, too. */
-				if (PHP_DEBUG_PACK == "yes") {
-					ADD_FLAG('CFLAGS', "/Gw");
-				}
+			if (PHP_PGI != "yes" && PHP_PGO != "yes") {
+				ADD_FLAG('CFLAGS', "/Zc:inline");
+			}
+			/* We enable /opt:icf only with the debug pack, so /Gw only makes sense there, too. */
+			if (PHP_DEBUG_PACK == "yes") {
+				ADD_FLAG('CFLAGS', "/Gw");
 			}
 		}
 
-		if (VCVERS >= 1914) {
-			/* This is only in effect for CXX sources, __cplusplus is not defined in C sources. */
-			ADD_FLAG("CFLAGS", "/Zc:__cplusplus");
-		}
+		/* This is only in effect for CXX sources, __cplusplus is not defined in C sources. */
+		ADD_FLAG("CFLAGS", "/Zc:__cplusplus");
 
-		if (VCVERS >= 1914) {
-			ADD_FLAG("CFLAGS", "/d2FuncCache1");
-		}
+		ADD_FLAG("CFLAGS", "/d2FuncCache1");
 
 		if (VCVERS >= 1930) {
 			ADD_FLAG("CFLAGS", "/Zc:preprocessor");
@@ -3436,10 +3402,8 @@ function toolset_setup_common_ldlags()
 	ADD_FLAG("PHP_LDFLAGS", "/nodefaultlib:libcmt");
 
 	if (VS_TOOLSET) {
-		if (VCVERS >= 1900) {
-			if (PHP_SECURITY_FLAGS == "yes") {
-				ADD_FLAG('LDFLAGS', "/GUARD:CF");
-			}
+		if (PHP_SECURITY_FLAGS == "yes") {
+			ADD_FLAG('LDFLAGS', "/GUARD:CF");
 		}
 		if (PHP_VS_LINK_COMPAT != "no") {
 			// Allow compatible IL versions, do not require an exact match.
@@ -3610,13 +3574,8 @@ function add_extra_dirs()
 		for (i = 0; i < path.length; i++) {
 			f = FSO.GetAbsolutePathName(path[i]);
 			if (FSO.FolderExists(f)) {
-				if (VS_TOOLSET && VCVERS <= 1200 && f.indexOf(" ") >= 0) {
-					ADD_FLAG("LDFLAGS", '/libpath:"\\"' + f + '\\"" ');
-					ADD_FLAG("ARFLAGS", '/libpath:"\\"' + f + '\\"" ');
-				} else {
-					ADD_FLAG("LDFLAGS", '/libpath:"' + f + '" ');
-					ADD_FLAG("ARFLAGS", '/libpath:"' + f + '" ');
-				}
+				ADD_FLAG("LDFLAGS", '/libpath:"' + f + '" ');
+				ADD_FLAG("ARFLAGS", '/libpath:"' + f + '" ');
 			}
 		}
 	}