diff --git a/readme.md b/readme.md
index 60b84aa..f5999a3 100644
--- a/readme.md
+++ b/readme.md
@@ -1,4 +1,4 @@
-<h1 align="center">QEMU<br />
+<h1 align="center">Qemu ARM<br />
 <div align="center">
 <img src="https://github.com/qemus/qemu-arm/raw/master/.github/logo.png" title="Logo" style="max-width:100%;" width="128" />
 </div>
diff --git a/src/boot.sh b/src/boot.sh
index d866bd3..1e1bee7 100644
--- a/src/boot.sh
+++ b/src/boot.sh
@@ -40,12 +40,14 @@ DEST="$STORAGE/${BOOT_MODE,,}"
 
 if [ ! -f "$DEST.rom" ]; then
   [ ! -f "$AAVMF/$ROM" ] && error "UEFI boot file ($AAVMF/$ROM) not found!" && exit 44
-  cp "$AAVMF/$ROM" "$DEST.rom"
+  dd if=/dev/zero "of=$DEST.rom" bs=1M count=64 status=none
+  dd "if=$AAVMF/$ROM" "of=$DEST.rom" conv=notrunc status=none
 fi
 
 if [ ! -f "$DEST.vars" ]; then
   [ ! -f "$AAVMF/$VARS" ] && error "UEFI vars file ($AAVMF/$VARS) not found!" && exit 45
-  cp "$AAVMF/$VARS" "$DEST.vars"
+  dd if=/dev/zero "of=$DEST.vars" bs=1M count=64 status=none
+  dd "if=$AAVMF/$VARS" "of=$DEST.vars" conv=notrunc status=none
 fi
 
 BOOT_OPTS="$BOOT_OPTS -drive file=$DEST.rom,if=pflash,unit=0,format=raw,readonly=on"
diff --git a/src/config.sh b/src/config.sh
index 64da6de..38cd19c 100644
--- a/src/config.sh
+++ b/src/config.sh
@@ -11,7 +11,7 @@ MON_OPTS="-monitor $MONITOR"
 USB_OPTS="-device $USB -device usb-kbd -device usb-tablet"
 RAM_OPTS=$(echo "-m $RAM_SIZE" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
 CPU_OPTS="-cpu $CPU_FLAGS -smp $CPU_CORES,sockets=1,dies=1,cores=$CPU_CORES,threads=1"
-MAC_OPTS="-machine type=${MACHINE},dump-guest-core=off${KVM_OPTS}"
+MAC_OPTS="-machine type=${MACHINE},secure=off,gic-version=3,dump-guest-core=off${KVM_OPTS}"
 DEV_OPTS="-device virtio-balloon-pci,id=balloon0,bus=pcie.0,addr=0x4"
 DEV_OPTS="$DEV_OPTS -object rng-random,id=objrng0,filename=/dev/urandom"
 DEV_OPTS="$DEV_OPTS -device virtio-rng-pci,rng=objrng0,id=rng0,bus=pcie.0,addr=0x1c"
diff --git a/src/proc.sh b/src/proc.sh
index 4506129..756b479 100644
--- a/src/proc.sh
+++ b/src/proc.sh
@@ -7,7 +7,7 @@ set -Eeuo pipefail
 : "${CPU_FLAGS:=""}"
 : "${CPU_MODEL:="host"}"
 
-[[ "$ARCH" != "arm64" ]] && KVM="N"
+[[ "$ARCH" != "arm"* ]] && KVM="N"
 
 if [[ "$KVM" != [Nn]* ]]; then
 
@@ -34,10 +34,11 @@ if [[ "$KVM" != [Nn]* ]]; then
 
   CPU_FEATURES="kvm=on"
   KVM_OPTS=",accel=kvm -enable-kvm"
-
+  
   if [[ "${BOOT_MODE,,}" == "windows" ]]; then
 
-    CPU_FEATURES="kvm=on,+hypervisor,+invtsc,l3-cache=on,migratable=no,hv_passthrough"
+    [ -n "$CPU_FEATURES" ] && CPU_FEATURES="$CPU_FEATURES,"
+    CPU_FEATURES="$CPU_FEATURES+hypervisor,+invtsc,l3-cache=on,migratable=no,hv_passthrough"
 
   fi
 
@@ -45,23 +46,34 @@ else
 
   KVM_OPTS=""
   CPU_FEATURES=""
-  MACHINE="$MACHINE,virtualization=on"
+
+  if [[ "${BOOT_MODE,,}" == "windows" ]]; then
+    MACHINE="$MACHINE,virtualization=on"
+  fi
 
   if [[ "${CPU_MODEL,,}" == "host"* ]]; then
 
     if [[ "$ARCH" == "arm"* ]]; then
       CPU_MODEL="max"
     else
-      CPU_MODEL="cortex-a57"
+      CPU_MODEL="cortex-a53"
     fi
 
   fi
 fi
 
 if [ -z "$CPU_FLAGS" ]; then
-  CPU_FLAGS="$CPU_MODEL,$CPU_FEATURES"
+  if [ -z "$CPU_FEATURES" ]; then
+    CPU_FLAGS="$CPU_MODEL"
+  else
+    CPU_FLAGS="$CPU_MODEL,$CPU_FEATURES"
+  fi
 else
-  CPU_FLAGS="$CPU_MODEL,$CPU_FEATURES,$CPU_FLAGS"
+  if [ -z "$CPU_FEATURES" ]; then
+    CPU_FLAGS="$CPU_MODEL,$CPU_FLAGS"
+  else
+    CPU_FLAGS="$CPU_MODEL,$CPU_FEATURES,$CPU_FLAGS"
+  fi
 fi
 
 return 0