diff --git a/qemu/launchers/kvm b/qemu/launchers/kvm
new file mode 100755
index 0000000..27c8ad4
--- /dev/null
+++ b/qemu/launchers/kvm
@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+from os import execvp
+from multiprocessing import cpu_count
+from psutil import virtual_memory
+from sys import argv
+
+nproc = cpu_count() // 2
+ram_kilo = virtual_memory().available // 2 // 1024
+
+command = [
+    'qemu-system-x86_64',
+    '-enable-kvm',
+    '-M', 'q35',
+    '-cpu', 'host', '-smp', str(nproc),
+    '-m', '{}K'.format(ram_kilo),
+    '-net', 'nic'
+] + argv[1:]
+
+print(command)
+execvp(command[0], command)
diff --git a/qemu/launchers/linux-spice b/qemu/launchers/kvm-spice
similarity index 85%
rename from qemu/launchers/linux-spice
rename to qemu/launchers/kvm-spice
index d38aeb8..a4e88e4 100755
--- a/qemu/launchers/linux-spice
+++ b/qemu/launchers/kvm-spice
@@ -1,7 +1,6 @@
 #!/bin/sh -x
-exec linux \
+exec kvm \
 	-vga qxl \
-	-device virtio-serial \
 	-chardev spicevmc,id=vdagent,debug=0,name=vdagent \
 	-device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
 	-spice port="$(first-free-port 5900)",addr=127.0.0.1,disable-ticketing=on \
diff --git a/qemu/launchers/linux b/qemu/launchers/linux
deleted file mode 100755
index 513afbc..0000000
--- a/qemu/launchers/linux
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/sh -x
-qemu-system-x86_64 \
-	-enable-kvm \
-	-M q35 \
-	-cpu host -smp "$(("$(nproc)" / 2))" \
-	-m "$(("$(free | awk '($1 == "Mem:") { print $2 }')" / 2))K" \
-	-net nic \
-	"$@"
diff --git a/qemu/launchers/redox b/qemu/launchers/redox
deleted file mode 100755
index d801324..0000000
--- a/qemu/launchers/redox
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/sh -x
-exec qemu-system-x86_64 \
-	-enable-kvm \
-	-M q35 \
-	-cpu host -smp "$(("$(nproc)" / 2))" \
-	-m "$(("$(free | grep '^Mem:\s' | awk '{ print $NF }')" / 2))K" \
-	-device e1000,netdev=net0 \
-	-device nec-usb-xhci,id=xhci \
-	-device ich9-intel-hda -device hda-duplex \
-	"$@"
diff --git a/qemu/launchers/redox-spice b/qemu/launchers/redox-spice
deleted file mode 100755
index f550aa6..0000000
--- a/qemu/launchers/redox-spice
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/sh -x
-exec redox \
-	-vga qxl -spice port="$(first-free-port 5900)",addr=127.0.0.1,disable-ticketing=on \
-	"$@"
diff --git a/qemu/launchers/windows b/qemu/launchers/windows
deleted file mode 100755
index acf4f15..0000000
--- a/qemu/launchers/windows
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/bin/sh -x
-qemu-system-x86_64 \
-	-enable-kvm \
-	-cpu host -smp "$(("$(nproc)" / 2))" \
-	-m "$(("$(free | grep '^Mem: ' | awk '{ print $NF }')" / 2))K" \
-	-net nic \
-	-device virtio-serial \
-	-usbdevice tablet \
-	"$@"
diff --git a/qemu/launchers/windows-spice b/qemu/launchers/windows-spice
deleted file mode 100755
index da49e67..0000000
--- a/qemu/launchers/windows-spice
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh -x
-exec windows \
-	-vga qxl \
-	-spice port="$(first-free-port 5900)",addr=127.0.0.1,disable-ticketing=on \
-	-chardev spicevmc,id=vdagent,name=vdagent \
-	-device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
-	"$@"
diff --git a/qemu/launchers/windows10 b/qemu/launchers/windows10
new file mode 100755
index 0000000..b3be044
--- /dev/null
+++ b/qemu/launchers/windows10
@@ -0,0 +1,10 @@
+#!/bin/sh -x
+name="$(basename "$0")"
+exec kvm-spice \
+	-monitor stdio \
+	-drive file="$(diskpath "$name")",if=virtio \
+	-net user,hostname="${name}" \
+	-device virtio-serial \
+	-usbdevice tablet \
+	-name "$name" \
+	"$@"