diff --git a/composer.lock b/composer.lock
index aa50c62df..73c009d82 100644
--- a/composer.lock
+++ b/composer.lock
@@ -160,16 +160,16 @@
         },
         {
             "name": "composer/spdx-licenses",
-            "version": "1.5.3",
+            "version": "1.5.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/spdx-licenses.git",
-                "reference": "0c3e51e1880ca149682332770e25977c70cf9dae"
+                "reference": "6946f785871e2314c60b4524851f3702ea4f2223"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/spdx-licenses/zipball/0c3e51e1880ca149682332770e25977c70cf9dae",
-                "reference": "0c3e51e1880ca149682332770e25977c70cf9dae",
+                "url": "https://api.github.com/repos/composer/spdx-licenses/zipball/6946f785871e2314c60b4524851f3702ea4f2223",
+                "reference": "6946f785871e2314c60b4524851f3702ea4f2223",
                 "shasum": ""
             },
             "require": {
@@ -219,9 +219,23 @@
             "support": {
                 "irc": "irc://irc.freenode.org/composer",
                 "issues": "https://github.com/composer/spdx-licenses/issues",
-                "source": "https://github.com/composer/spdx-licenses/tree/1.5.3"
+                "source": "https://github.com/composer/spdx-licenses/tree/1.5.4"
             },
-            "time": "2020-02-14T07:44:31+00:00"
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-07-15T15:35:07+00:00"
         },
         {
             "name": "composer/xdebug-handler",
@@ -519,16 +533,16 @@
         },
         {
             "name": "seld/phar-utils",
-            "version": "1.1.0",
+            "version": "1.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Seldaek/phar-utils.git",
-                "reference": "8800503d56b9867d43d9c303b9cbcc26016e82f0"
+                "reference": "8674b1d84ffb47cc59a101f5d5a3b61e87d23796"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Seldaek/phar-utils/zipball/8800503d56b9867d43d9c303b9cbcc26016e82f0",
-                "reference": "8800503d56b9867d43d9c303b9cbcc26016e82f0",
+                "url": "https://api.github.com/repos/Seldaek/phar-utils/zipball/8674b1d84ffb47cc59a101f5d5a3b61e87d23796",
+                "reference": "8674b1d84ffb47cc59a101f5d5a3b61e87d23796",
                 "shasum": ""
             },
             "require": {
@@ -561,9 +575,9 @@
             ],
             "support": {
                 "issues": "https://github.com/Seldaek/phar-utils/issues",
-                "source": "https://github.com/Seldaek/phar-utils/tree/1.1.0"
+                "source": "https://github.com/Seldaek/phar-utils/tree/master"
             },
-            "time": "2020-02-14T15:25:33+00:00"
+            "time": "2020-07-07T18:42:57+00:00"
         },
         {
             "name": "symfony/console",
@@ -796,16 +810,16 @@
         },
         {
             "name": "symfony/polyfill-ctype",
-            "version": "v1.17.0",
+            "version": "v1.18.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "e94c8b1bbe2bc77507a1056cdb06451c75b427f9"
+                "reference": "1c302646f6efc070cd46856e600e5e0684d6b454"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/e94c8b1bbe2bc77507a1056cdb06451c75b427f9",
-                "reference": "e94c8b1bbe2bc77507a1056cdb06451c75b427f9",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/1c302646f6efc070cd46856e600e5e0684d6b454",
+                "reference": "1c302646f6efc070cd46856e600e5e0684d6b454",
                 "shasum": ""
             },
             "require": {
@@ -817,7 +831,11 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.17-dev"
+                    "dev-master": "1.18-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
@@ -851,7 +869,7 @@
                 "portable"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.17.0"
+                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.18.0"
             },
             "funding": [
                 {
@@ -867,20 +885,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-05-12T16:14:59+00:00"
+            "time": "2020-07-14T12:35:20+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.17.0",
+            "version": "v1.18.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "fa79b11539418b02fc5e1897267673ba2c19419c"
+                "reference": "a6977d63bf9a0ad4c65cd352709e230876f9904a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/fa79b11539418b02fc5e1897267673ba2c19419c",
-                "reference": "fa79b11539418b02fc5e1897267673ba2c19419c",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/a6977d63bf9a0ad4c65cd352709e230876f9904a",
+                "reference": "a6977d63bf9a0ad4c65cd352709e230876f9904a",
                 "shasum": ""
             },
             "require": {
@@ -892,7 +910,11 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.17-dev"
+                    "dev-master": "1.18-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
@@ -927,7 +949,7 @@
                 "shim"
             ],
             "support": {
-                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.17.0"
+                "source": "https://github.com/symfony/polyfill-mbstring/tree/master"
             },
             "funding": [
                 {
@@ -943,7 +965,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-05-12T16:47:27+00:00"
+            "time": "2020-07-14T12:35:20+00:00"
         },
         {
             "name": "symfony/process",
diff --git a/src/Composer/Command/CreateProjectCommand.php b/src/Composer/Command/CreateProjectCommand.php
index ddebbac8c..f7369e28e 100644
--- a/src/Composer/Command/CreateProjectCommand.php
+++ b/src/Composer/Command/CreateProjectCommand.php
@@ -41,6 +41,7 @@ use Composer\Util\Filesystem;
 use Composer\Util\ProcessExecutor;
 use Composer\Util\Loop;
 use Composer\Package\Version\VersionParser;
+use Composer\EventDispatcher\EventDispatcher;
 
 /**
  * Install a package as new project into new directory.
@@ -351,9 +352,13 @@ EOT
             throw new \InvalidArgumentException('Invalid stability provided ('.$stability.'), must be one of: '.implode(', ', array_keys(BasePackage::$stabilities)));
         }
 
+        $composer = Factory::create($io, $config->all(), $disablePlugins);
+        $config = $composer->getConfig();
+        $rm = $composer->getRepositoryManager();
+
         $repositorySet = new RepositorySet($stability);
         if (null === $repositories) {
-            $repositorySet->addRepository(new CompositeRepository(RepositoryFactory::defaultRepos($io, $config)));
+            $repositorySet->addRepository(new CompositeRepository(RepositoryFactory::defaultRepos($io, $config, $rm)));
         } else {
             foreach ($repositories as $repo) {
                 $repoConfig = RepositoryFactory::configFromString($io, $config, $repo, true);
@@ -363,7 +368,7 @@ EOT
                 ) {
                     continue;
                 }
-                $repositorySet->addRepository(RepositoryFactory::createRepo($io, $config, $repoConfig));
+                $repositorySet->addRepository(RepositoryFactory::createRepo($io, $config, $repoConfig, $rm));
             }
         }
 
@@ -422,15 +427,12 @@ EOT
             $package = $package->getAliasOf();
         }
 
-        $factory = new Factory();
-
-        $httpDownloader = $factory->createHttpDownloader($io, $config);
-        $dm = $factory->createDownloadManager($io, $config, $httpDownloader, $process);
+        $dm = $composer->getDownloadManager();
         $dm->setPreferSource($preferSource)
             ->setPreferDist($preferDist);
 
         $projectInstaller = new ProjectInstaller($directory, $dm, $fs);
-        $im = $factory->createInstallationManager(new Loop($httpDownloader, $process), $io);
+        $im = $composer->getInstallationManager();
         $im->setOutputProgress(!$noProgress);
         $im->addInstaller($projectInstaller);
         $im->execute(new InstalledFilesystemRepository(new JsonFile('php://memory')), array(new InstallOperation($package)));
diff --git a/src/Composer/Command/SelfUpdateCommand.php b/src/Composer/Command/SelfUpdateCommand.php
index 2e1d37d43..d79d22df2 100644
--- a/src/Composer/Command/SelfUpdateCommand.php
+++ b/src/Composer/Command/SelfUpdateCommand.php
@@ -380,8 +380,8 @@ TAGSPUBKEY
             // see if we can run this operation as an Admin on Windows
             if (!is_writable(dirname($localFilename))
                 && $io->isInteractive()
-                && $this->isWindowsNonAdminUser($isCygwin)) {
-                return $this->tryAsWindowsAdmin($localFilename, $newFilename, $isCygwin);
+                && $this->isWindowsNonAdminUser()) {
+                return $this->tryAsWindowsAdmin($localFilename, $newFilename);
             }
 
             $action = 'Composer '.($backupTarget ? 'update' : 'rollback');
@@ -467,20 +467,16 @@ TAGSPUBKEY
     /**
      * Returns true if this is a non-admin Windows user account
      *
-     * @param null|bool $isCygwin Set by method
      * @return bool
      */
-    protected function isWindowsNonAdminUser(&$isCygwin)
+    protected function isWindowsNonAdminUser()
     {
-        $isCygwin = preg_match('/cygwin/i', php_uname());
-
-        if (!$isCygwin && !Platform::isWindows()) {
+        if (!Platform::isWindows()) {
             return false;
         }
 
         // fltmc.exe manages filter drivers and errors without admin privileges
-        $command = sprintf('%sfltmc.exe filters', $isCygwin ? 'cmd.exe /c ' : '');
-        exec($command, $output, $exitCode);
+        exec('fltmc.exe filters', $output, $exitCode);
 
         return $exitCode !== 0;
     }
@@ -492,10 +488,9 @@ TAGSPUBKEY
      *
      * @param string $localFilename The composer.phar location
      * @param string $newFilename The downloaded or backup phar
-     * @param bool $isCygwin Whether we are running on Cygwin
      * @return bool Whether composer.phar has been updated
      */
-    protected function tryAsWindowsAdmin($localFilename, $newFilename, $isCygwin)
+    protected function tryAsWindowsAdmin($localFilename, $newFilename)
     {
         $io = $this->getIO();
 
@@ -515,15 +510,9 @@ TAGSPUBKEY
 
         $checksum = hash_file('sha256', $newFilename);
 
-        // format the file names for cmd.exe
-        if ($isCygwin) {
-            $source = exec(sprintf("cygpath -w '%s'", $newFilename));
-            $destination = exec(sprintf("cygpath -w '%s'", $localFilename));
-        } else {
-            // cmd's internal move is fussy about backslashes
-            $source = str_replace('/', '\\', $newFilename);
-            $destination = str_replace('/', '\\', $localFilename);
-        }
+        // cmd's internal move is fussy about backslashes
+        $source = str_replace('/', '\\', $newFilename);
+        $destination = str_replace('/', '\\', $localFilename);
 
         $vbs = <<<EOT
 Set UAC = CreateObject("Shell.Application")
@@ -532,16 +521,7 @@ Wscript.Sleep(300)
 EOT;
 
         file_put_contents($script, $vbs);
-
-        if ($isCygwin) {
-            chmod($script, 0755);
-            $cygscript = sprintf('"%s"', exec(sprintf("cygpath -w '%s'", $script)));
-            $command = sprintf("cmd.exe /c '%s'", $cygscript);
-        } else {
-            $command = sprintf('"%s"', $script);
-        }
-
-        exec($command);
+        exec('"'.$script.'"');
         @unlink($script);
 
         // see if the file was moved
diff --git a/src/Composer/Repository/RepositoryFactory.php b/src/Composer/Repository/RepositoryFactory.php
index b36664187..7b7e729d3 100644
--- a/src/Composer/Repository/RepositoryFactory.php
+++ b/src/Composer/Repository/RepositoryFactory.php
@@ -63,11 +63,11 @@ class RepositoryFactory
      * @param  bool                $allowFilesystem
      * @return RepositoryInterface
      */
-    public static function fromString(IOInterface $io, Config $config, $repository, $allowFilesystem = false)
+    public static function fromString(IOInterface $io, Config $config, $repository, $allowFilesystem = false, RepositoryManager $rm = null)
     {
         $repoConfig = static::configFromString($io, $config, $repository, $allowFilesystem);
 
-        return static::createRepo($io, $config, $repoConfig);
+        return static::createRepo($io, $config, $repoConfig, $rm);
     }
 
     /**
@@ -76,9 +76,11 @@ class RepositoryFactory
      * @param  array               $repoConfig
      * @return RepositoryInterface
      */
-    public static function createRepo(IOInterface $io, Config $config, array $repoConfig)
+    public static function createRepo(IOInterface $io, Config $config, array $repoConfig, RepositoryManager $rm = null)
     {
-        $rm = static::manager($io, $config, Factory::createHttpDownloader($io, $config));
+        if (!$rm) {
+            $rm = static::manager($io, $config, Factory::createHttpDownloader($io, $config));
+        }
         $repos = static::createRepos($rm, array($repoConfig));
 
         return reset($repos);