diff --git a/src/define.sh b/src/define.sh
index 4884f5d..931161f 100644
--- a/src/define.sh
+++ b/src/define.sh
@@ -135,8 +135,12 @@ parseVersion() {
     "2003" | "2003r2" | "win2003" | "win2003r2" | "windows2003" | "windows 2003" )
       VERSION="win2003r2"
       ;;
-    "core11" | "core 11" )
-      VERSION="core11"
+    "nano11" | "nano 11" )
+      VERSION="nano11"
+      [ -z "$DETECTED" ] && DETECTED="win11x64"
+      ;;      
+    "" | "core 11" )
+      VERSION=""
       [ -z "$DETECTED" ] && DETECTED="win11x64"
       ;;
     "tiny11" | "tiny 11" )
@@ -432,6 +436,7 @@ printVersion() {
     "tiny11"* ) desc="Tiny 11" ;;
     "tiny10"* ) desc="Tiny 10" ;;
     "core11"* ) desc="Core 11" ;;
+    "nano11"* ) desc="Nano 11" ;;    
     "win7"* ) desc="Windows 7" ;;
     "win8"* ) desc="Windows 8" ;;
     "win10"* ) desc="Windows 10" ;;
@@ -570,6 +575,9 @@ fromFile() {
     *"winvista"* | *"win_vista"* | *"windowsvista"* | *"windows_vista"* )
       id="winvista${arch}"
       ;;
+    "nano11"* | "nano_11"* )
+      id="nano11"
+      ;;     
     "tiny11core"* | "tiny11_core"* | "tiny_11_core"* )
       id="core11"
       ;;
@@ -1093,6 +1101,11 @@ getLink4() {
   [[ "${lang,,}" != "en" ]] && [[ "${lang,,}" != "en-us" ]] && return 0
 
   case "${id,,}" in
+    "nano11" )
+      size=2463565824
+      sum="a1e0614372768cbe2d24de74b78a4a97bc1017ea5080dfed1d2125e4a527eb1a"
+      url="nano11_25h2/nano11%2025h2.iso"
+      ;;
     "core11" )
       size=2159738880
       sum="78f0f44444ff95b97125b43e560a72e0d6ce0a665cf9f5573bf268191e5510c1"
diff --git a/src/install.sh b/src/install.sh
index 867a4c8..be1aaa9 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -9,30 +9,40 @@ backup () {
 
   local count=1
   local iso="$1"
-  local name="$2"
+  local name="unknown"
+  local root="$STORAGE/backups"
+  local previous="$STORAGE/windows.base"
+
+  if [ -f "$previous" ]; then
+
+    previous=$(<"$previous")
+    previous="${previous//[![:print:]]/}"
+
+    [ -n "$previous" ] && name="${previous%.*}"
+
+  fi
+
+  mkdir -p "$root"
   local folder="$name"
-  local dir="$STORAGE/backups"
+  local dir="$root/$folder"
 
-  mkdir -p "$dir"
-
-  while [ -d "$STORAGE/$folder" ]
+  while [ -d "$dir" ]
   do
     count=$[$count +1]
     folder="${name}.${count}"
+    dir="$root/$folder"
   done
 
-  dir+="/$folder"
-
   rm -rf "$dir"
   mkdir -p "$dir"
 
   [ -f "$iso" ] && mv -f "$iso" "$dir/"
+  find "$STORAGE" -maxdepth 1 -type f -iname 'data.*' -not -iname '*.iso' -exec mv -n {} "$dir/" \;
+  find "$STORAGE" -maxdepth 1 -type f -iname 'windows.*' -not -iname '*.iso' -exec mv -n {} "$dir/" \;
   find "$STORAGE" -maxdepth 1 -type f \( -iname '*.rom' -or -iname '*.vars' \) -exec mv -n {} "$dir/" \;
-  find "$STORAGE" -maxdepth 1 -type f \( -iname 'data.*' -or -iname 'windows.*' \) -exec mv -n {} "$dir/" \;
 
-  if [ -z "$(ls -A "$dir")" ]; then
-    rm -rf "$dir"
-  fi
+  [ -z "$(ls -A "$dir")" ] && rm -rf "$dir"
+  [ -z "$(ls -A "$root")" ] && rm -rf "$root"
 
   return 0
 }
@@ -51,7 +61,6 @@ skipInstall() {
     previous="${previous//[![:print:]]/}"
 
     if [ -n "$previous" ]; then
-
       if [[ "${STORAGE,,}/${previous,,}" != "${iso,,}" ]]; then
 
         if ! hasDisk; then
@@ -78,10 +87,7 @@ skipInstall() {
         fi
 
         info "Detected that $method, a backup of your previous installation will be saved..."
-
-        if ! backup "$STORAGE/$previous" "${previous%.*}"; then
-          error "Backup failed!"
-        fi
+        ! backup "$STORAGE/$previous" && error "Backup failed!"
 
         return 1
 
@@ -146,11 +152,7 @@ startInstall() {
   skipInstall "$BOOT" && return 1
 
   if hasDisk; then
-
-    if ! backup "" "backup"; then
-      error "Backup failed!"
-    fi
-
+    ! backup "" && error "Backup failed!"
   fi
 
   mkdir -p "$TMP"
@@ -168,8 +170,9 @@ startInstall() {
 
   rm -f "$BOOT"
 
+  find "$STORAGE" -maxdepth 1 -type f -iname 'data.*' -not -iname '*.iso' -delete
+  find "$STORAGE" -maxdepth 1 -type f -iname 'windows.*' -not -iname '*.iso' -delete
   find "$STORAGE" -maxdepth 1 -type f \( -iname '*.rom' -or -iname '*.vars' \) -delete
-  find "$STORAGE" -maxdepth 1 -type f \( -iname 'data.*' -or -iname 'windows.*' \) -delete
 
   return 0
 }