diff --git a/autoload/vundle/config.vim b/autoload/vundle/config.vim
index 0e02b112..d50a6f8c 100644
--- a/autoload/vundle/config.vim
+++ b/autoload/vundle/config.vim
@@ -7,8 +7,8 @@
 " ---------------------------------------------------------------------------
 func! vundle#config#bundle(arg, ...)
   let bundle = vundle#config#init_bundle(a:arg, a:000)
-  if !s:check_bundle_name(bundle)
-    return
+  if 'new'!=s:register_bundle_name(bundle)
+    return {}
   endif
   if exists('g:vundle#lazy_load') && g:vundle#lazy_load
     call add(g:vundle#bundles, bundle)
@@ -84,25 +84,30 @@ endf
 
 
 " ---------------------------------------------------------------------------
-" Check if the current bundle name has already been used in this running
-" instance and show an error to that effect.
+" Check if the current bundle name has already been used by another bundle in
+" this running instance. If bundle name is unique and valid, register it to
+" current bundle, else show an error.
 "
-" bundle -- a bundle object whose name is to be checked
-" return -- 0 if the bundle's name has been seen before, 1 otherwise
+" bundle -- a bundle object whose name is to be checked/registered
+" return -- 'new'|'known'|'collision'|'invalid'
 " ---------------------------------------------------------------------------
-funct! s:check_bundle_name(bundle)
+funct! s:register_bundle_name(bundle)
   if has_key(s:bundle_names, a:bundle.name)
-    echoerr 'Vundle error: Name collision for Plugin ' . a:bundle.name_spec .
-          \ '. Plugin ' . s:bundle_names[a:bundle.name] .
-          \ ' previously used the name "' . a:bundle.name . '"' .
-          \ '. Skipping Plugin ' . a:bundle.name_spec . '.'
-    return 0
+    if s:bundle_names[a:bundle.name]==a:bundle.name_spec
+      return 'known'
+    else
+      echoerr 'Vundle error: Name collision for Plugin ' . a:bundle.name_spec .
+            \ '. Plugin ' . s:bundle_names[a:bundle.name] .
+            \ ' previously used the name "' . a:bundle.name . '"' .
+            \ '. Skipping Plugin ' . a:bundle.name_spec . '.'
+      return 'collision'
+    endif
   elseif a:bundle.name !~ '\v^[A-Za-z0-9_-]%(\.?[A-Za-z0-9_-])*$'
     echoerr 'Invalid plugin name: ' . a:bundle.name
-    return 0
+    return 'invalid'
   endif
   let s:bundle_names[a:bundle.name] = a:bundle.name_spec
-  return 1
+  return 'new'
 endf
 
 
diff --git a/autoload/vundle/installer.vim b/autoload/vundle/installer.vim
index 472271a3..d78c3645 100644
--- a/autoload/vundle/installer.vim
+++ b/autoload/vundle/installer.vim
@@ -15,7 +15,7 @@ func! vundle#installer#new(bang, ...) abort
     let bundles = filter(copy(g:vundle#bundles), 'index(a:000, v:val.name) > -1')
   " Specific plugins are specified for installation. Install them.
   else
-    let bundles = map(copy(a:000), 'vundle#config#bundle(v:val, {})')
+    let bundles = filter(map(copy(a:000), 'vundle#config#bundle(v:val, {})'),'v:val!={}')
   endif
 
   if empty(bundles)
@@ -150,8 +150,10 @@ endf
 func! vundle#installer#install_and_require(bang, name) abort
   let result = vundle#installer#install(a:bang, a:name)
   let b = vundle#config#bundle(a:name, {})
-  call vundle#installer#helptags([b])
-  call vundle#config#require([b])
+  if b!={}
+    call vundle#installer#helptags([b])
+    call vundle#config#require([b])
+  endif
   return result
 endf
 
@@ -285,7 +287,7 @@ func! vundle#installer#delete(bang, dir_name) abort
   let bundle = vundle#config#init_bundle(a:dir_name, {})
   let cmd .= ' '.vundle#installer#shellesc(bundle.path())
 
-  let out = s:system(cmd)
+  let out = vundle#installer#system(cmd)
 
   call s:log('')
   call s:log('Plugin '.a:dir_name)
@@ -345,7 +347,7 @@ endf
 func! s:get_current_origin_url(bundle) abort
   let cmd = 'cd '.vundle#installer#shellesc(a:bundle.path()).' && git config --get remote.origin.url'
   let cmd = vundle#installer#shellesc_cd(cmd)
-  let out = s:strip(s:system(cmd))
+  let out = s:strip(vundle#installer#system(cmd))
   return out
 endf
 
@@ -359,7 +361,7 @@ endf
 func! s:get_current_sha(bundle)
   let cmd = 'cd '.vundle#installer#shellesc(a:bundle.path()).' && git rev-parse HEAD'
   let cmd = vundle#installer#shellesc_cd(cmd)
-  let out = s:system(cmd)[0:15]
+  let out = vundle#installer#system(cmd)[0:15]
   return out
 endf
 
@@ -446,10 +448,10 @@ func! s:sync(bang, bundle) abort
       return 'todate'
   endif
 
-  let out = s:system(cmd)
   call s:log('')
   call s:log('Plugin '.a:bundle.name_spec)
   call s:log(cmd, '$ ')
+  let out = vundle#installer#system(cmd)
   call s:log(out, '> ')
 
   if 0 != v:shell_error
@@ -510,9 +512,28 @@ endf
 " cmd    -- the command passed to system() (string)
 " return -- the return value from system()
 " ---------------------------------------------------------------------------
-func! s:system(cmd) abort
-  return system(a:cmd)
-endf
+if (has("win32") || has("win64")) &&
+  \  (v:version<703 ||
+  \  (v:version==703 && (!has("patch443") || !has("patch445") || !has("patch446"))) )
+
+  func! vundle#installer#system(cmd) abort
+    " see cmd.exe docs (scroll down to remarks):
+    " https://technet.microsoft.com/de-de/library/cc771320(v=ws.10).aspx
+    " and vim patches links: https://github.com/airblade/vim-system-escape
+    if &shell=~"cmd.exe"
+      return system('"'.a:cmd.'"')
+    else
+      return system(a:cmd)
+    endif
+  endf
+
+else
+
+  func! vundle#installer#system(cmd) abort
+    return system(a:cmd)
+  endf
+
+endif
 
 
 " ---------------------------------------------------------------------------
diff --git a/autoload/vundle/scripts.vim b/autoload/vundle/scripts.vim
index 5d564760..a9946a76 100644
--- a/autoload/vundle/scripts.vim
+++ b/autoload/vundle/scripts.vim
@@ -85,7 +85,7 @@ func! s:create_changelog() abort
 
     let cmd = vundle#installer#shellesc_cd(cmd)
 
-    let updates = system(cmd)
+    let updates = vundle#installer#system(cmd)
 
     call add(changelog, '')
     call add(changelog, 'Updated Plugin: '.bundle.name)
@@ -239,7 +239,7 @@ func! s:fetch_scripts(to)
     return 1
   endif
 
-  call system(cmd)
+  call vundle#installer#system(cmd)
 
   if (0 != v:shell_error)
     echoerr 'Error fetching scripts!'