diff --git a/linux-game-manager.sh b/linux-game-manager.sh
index 92c4857..3bbd9b9 100755
--- a/linux-game-manager.sh
+++ b/linux-game-manager.sh
@@ -192,45 +192,63 @@ clear_cache() {
 }
 
 download() {
-    local source=($@)
-    for i in "${source[@]}" ; do
-        local dest="${i##*/}"
-        dest="${dest//%20/ }"
-        dest="${dest#*\?filename=}"
-        dest="${dest%\?*}"
-        # Remove the destination file if it is empty.
-        test -s "${cache}/${dest}" || rm -f "${cache}/${dest}" 2> /dev/null
-        if [[ "${redownload}" == "true" ]] && [[ -e "${cache}/${dest}" ]]; then
-            rm -v "${cache}/${dest}"
-        fi
-        # Skip if the item is in cache.
-        test -e "${cache}/${dest}" && continue
-        { if ! curl -L4 --output "${cache}/${dest}" "${i}" ; then
-            echo "Could not download \"$i\"..."
-            exit 1
-        fi; } | dialog --backtitle "Linux Game Manager" \
-            --progressbox "Downloading \"$dest\" from \"$i\"" -1 -1
-        local downloadError=1
-        case "${dest##*.}" in
-            "pk3"|"zip")
-                unzip -tq "${cache}/${dest}"  | dialog --backtitle "Linux Game Manager" \
-                    --progressbox "Validating ${dest##*.} file" -1 -1 --stdout
-                    downloadError= $?
-            ;;
-            "wad")
-                if [[ "$(file -b --mime-type "${cache}/${dest}")" != "application/octet-stream" ]]; then
-                    downloadError=0
-                fi
-            ;;
-        esac
-        if [[ $downloadError -eq 0 ]]; then
-            rm -fv "${cache}/${dest}"
-                    dialog --backtitle "Linux Game Manager" \
-                        --infobox "Error downloading \"${dest}\". Installation cannot continue." -1 -1 --stdout
-                    alert
-                    exit 1
-        fi
-    done
+   local source=($@)
+   for i in "${source[@]}" ; do
+       local dest="${i##*/}"
+       dest="${dest//%20/ }"
+       dest="${dest#*\?filename=}"
+       dest="${dest%\?*}"
+       # Remove the destination file if it is empty.
+       test -s "${cache}/${dest}" || rm -f "${cache}/${dest}" 2> /dev/null
+       if [[ "${redownload}" == "true" ]] && [[ -e "${cache}/${dest}" ]]; then
+           rm -v "${cache}/${dest}"
+       fi
+       # Skip if the item is in cache.
+       test -e "${cache}/${dest}" && continue
+       { if ! curl -L4 -C - --retry 10 --output "${cache}/${dest}" "${i}" ; then
+           echo "Could not download \"$i\"..."
+           exit 1
+       fi; } | dialog --backtitle "Linux Game Manager" \
+           --progressbox "Downloading \"$dest\" from \"$i\"" -1 -1
+       local downloadError=1
+       case "${dest##*.}" in
+           "pk3"|"zip")
+               unzip -tq "${cache}/${dest}"  | dialog --backtitle "Linux Game Manager" \
+                   --progressbox "Validating ${dest##*.} file" -1 -1 --stdout
+                   downloadError=$?
+           ;;
+           "7z")
+               7z t "${cache}/${dest}" | dialog --backtitle "Linux Game Manager" \
+                   --progressbox "Validating 7z file" -1 -1 --stdout
+                   downloadError=$?
+           ;;
+           "exe")
+               # Check if it's a valid Windows executable by looking at the MZ header
+               if ! hexdump -n 2 -v -e '/1 "%02X"' "${cache}/${dest}" | grep -q "4D5A"; then
+                   downloadError=0
+               fi
+           ;;
+           "wad")
+               if [[ "$(file -b --mime-type "${cache}/${dest}")" != "application/octet-stream" ]]; then
+                   downloadError=0
+               fi
+           ;;
+           *)
+               # Add HTML check for other file types
+               if file -b "${cache}/${dest}" | grep -q "HTML document" ; then
+                   echo "File not found: \"$i\" (HTML document probably 404)"
+                   downloadError=0
+               fi
+           ;;
+       esac
+       if [[ $downloadError -eq 0 ]]; then
+           rm -fv "${cache}/${dest}"
+                   dialog --backtitle "Linux Game Manager" \
+                       --infobox "Error downloading \"${dest}\". Installation cannot continue." -1 -1 --stdout
+                   alert
+                   exit 1
+       fi
+   done
 }
 
 download_named() {