diff --git a/resources/blobs.sh b/resources/blobs.sh
index 71bb1ce..cebb369 100755
--- a/resources/blobs.sh
+++ b/resources/blobs.sh
@@ -68,7 +68,7 @@ Save712Blobs() {
         mv BuildManifest.plist resources/manifests/$BuildManifest
     fi
 
-    if [[ -e saved/shsh/$SHSH7 ]]; then
+    if [[ -e $SHSH ]]; then
         Log "Found existing saved 7.1.2 blobs."
         return
     fi
@@ -77,6 +77,6 @@ Save712Blobs() {
     SHSHChk=$(ls ${UniqueChipID}_${ProductType}_7.1.2-11D257_*.shsh2)
     [[ ! $SHSHChk ]] && Error "Saving $OSVer blobs failed. Please run the script again"
     mkdir saved/shsh 2>/dev/null
-    mv $SHSHChk saved/shsh/$SHSH7
+    mv $SHSHChk $SHSH
     Log "Successfully saved 7.1.2 blobs."
 }
diff --git a/resources/device.sh b/resources/device.sh
index d78021f..c6aa99b 100755
--- a/resources/device.sh
+++ b/resources/device.sh
@@ -190,6 +190,9 @@ GetDeviceValues() {
         iBSSBuildVer="12H321"
     fi
     [[ ! $IPSWType ]] && IPSWType="$ProductType"
+    iBEC="iBEC.$iBSS.RELEASE"
+    iBECb="iBEC.${iBSS}b.RELEASE"
+    iBSSb="iBSS.${iBSS}b.RELEASE"
     iBSS="iBSS.$iBSS.RELEASE"
     SEP="sep-firmware.$HWModel.RELEASE.im4p"
     
@@ -489,7 +492,7 @@ EnterPwnREC() {
         iBSS=$iBSSb
     fi
 
-    while (( $Attempt < 4 )); do
+    while (( Attempt < 4 )); do
         Log "Entering pwnREC mode... (Attempt $Attempt)"
         Log "Sending iBSS..."
         $irecovery -f $IPSWCustom/Firmware/dfu/$iBSS.im4p
@@ -502,7 +505,7 @@ EnterPwnREC() {
         ((Attempt++))
     done
 
-    if (( $Attempt == 4 )); then
+    if (( Attempt == 4 )); then
         Error "Failed to enter pwnREC mode. You may have to force restart your device and start over entering pwnDFU mode again"
     fi
 }
diff --git a/resources/downgrade.sh b/resources/downgrade.sh
index 571375e..89f9bc9 100755
--- a/resources/downgrade.sh
+++ b/resources/downgrade.sh
@@ -33,11 +33,12 @@ FRBaseband() {
 }
 
 FutureRestore() {
-    local ExtraArgs=("--use-pwndfu")
+    local ExtraArgs=()
 
     Log "Proceeding to futurerestore..."
     [[ $platform == "linux" ]] && Echo "* Enter your user password when prompted"
     if [[ $platform != "win" ]]; then
+        ExtraArgs+=("--use-pwndfu")
         cd resources
         $SimpleHTTPServer &
         ServerPID=$!
@@ -122,7 +123,7 @@ DowngradeOTAWin() {
     fi
     IPSWFindVerify
     if [[ $DeviceProc == 7 ]]; then
-        IPSWSetExtract extract
+        IPSWSetExtract
         IPSW64
         EnterPwnREC
         local APNonce=$($irecovery -q | grep "NONC" | cut -c 7-)
diff --git a/resources/ipsw.sh b/resources/ipsw.sh
index e389590..55b0788 100755
--- a/resources/ipsw.sh
+++ b/resources/ipsw.sh
@@ -124,20 +124,19 @@ IPSWFindVerify() {
 }
 
 IPSWSetExtract() {
-    if [[ $1 != "extract" ]]; then
-        if [[ -e "$IPSWCustom.ipsw" ]]; then
-            Log "Setting restore IPSW to: $IPSWCustom.ipsw"
-            IPSWRestore="$IPSWCustom"
-        elif [[ -z $IPSWRestore ]]; then
-            Log "Setting restore IPSW to: $IPSW.ipsw"
-            IPSWRestore="$IPSW"
-        fi
+    if [[ -e "$IPSWCustom.ipsw" ]]; then
+        Log "Setting restore IPSW to: $IPSWCustom.ipsw"
+        IPSWRestore="$IPSWCustom"
+    elif [[ -z $IPSWRestore ]]; then
+        Log "Setting restore IPSW to: $IPSW.ipsw"
+        IPSWRestore="$IPSW"
     fi
 
-    if [[ $1 != "set" ]]; then
-        Log "Extracting IPSW: $IPSWRestore.ipsw"
-        unzip -oq "$IPSWRestore.ipsw" -d "$IPSWRestore"/
+    if [[ $1 == "set" ]]; then
+        return
     fi
+    Log "Extracting IPSW: $IPSWRestore.ipsw"
+    unzip -oq "$IPSWRestore.ipsw" -d "$IPSWRestore"/
 }
 
 IPSW32() {
diff --git a/restore.cmd b/restore.cmd
index 507ce57..c880b44 100755
--- a/restore.cmd
+++ b/restore.cmd
@@ -1,4 +1,21 @@
 @echo off
+
+if not exist "C:\Program Files\iTunes\iTunes.exe" (
+    echo [Error] iTunes does not seem to be installed.
+    echo * Please install iTunes 12.6.5 first before proceeding.
+    echo * Read the "How to Use" wiki page in GitHub for more details.
+    pause >nul
+    exit
+)
+
+if not exist "C:\msys64\msys2.exe" (
+    echo [Error] MSYS2 does not seem to be installed.
+    echo * Please install MSYS2 first before proceeding.
+    echo * Read the "How to Use" wiki page in GitHub for more details.
+    pause >nul
+    exit
+)
+
 C:\msys64\msys2.exe "./restore.sh"
 
 rem Add the argument at the end of the line above if needed