diff --git a/install.sh b/install.sh
index 84a9638..b9e90d7 100755
--- a/install.sh
+++ b/install.sh
@@ -13,12 +13,61 @@ if [ `id -u` -ne 0 ]; then
    exit 1
 fi
 
+# Ask for user parameters
+echo "This installer is meant to install the yubilock service for one user. Please specifiy for wich user you want to install xscreensaver-yubilock"
+read -p 'Username: ' username
+userid=`id -u "$username" 2>/dev/null` || ( echo "$username is not a user on this system" && exit 1 )
+[ "$userid" -lt 1000 ] && echo "User $username seems to be a systemuser (uid: $userid). Please specify a normal user." && exit 1 
+
+echo "Allowed yubikey serials can be set in {$install_dir}config.ini. Do you wish to add one or more automaticaly now?"
+read -p "Add Yubikey serial? (Y/n) " add_serial
+[ -z "$add_serial" ] && add_serial='yes' # if no input, assume yes
+case ${add_serial:0:1} in
+   y|Y|1 )
+      add_serial='yes';;
+   * )
+      add_serial='no';;
+esac
+if [ "$add_serial" = 'yes' ]; then
+   if  ! ykman -v >/dev/null 2>&1 ; then
+      echo "yubikey-manager doesn't seem to be installed. Do you want to install it? ('no' means you'll have to add your yubikey serial manually later"
+      read -p "Install yubikey-manager? (Y/n) " install_ykman
+      [ -z "$install_ykman" ] && install_ykman='yes' # if no input, assume yes
+      case ${install_ykman:0:1} in
+         y|Y|1 )
+            apt-get install -y yubikey-manager;;
+         * )
+            break 3;;
+      esac
+   fi
+   echo "Please make sure your yubikey(s) are plugged in. Then press any key to continue"
+   read -n 1 -s -r
+   serials=`ykman list | sed -e 's#.*:\ \(\)#\1#' | tr '\n' ','` # List all keys, get the serials, and comma separate them
+   serials="${serials%?}" # Remove trailing comma
+   echo "The following serial(s) will be added to your config file: $serials"
+fi
+
+
+
+echo "Do you want the daemon to be started by systemd? (you'll have to start it manually every login session if you choose no)"
+read -p "Use Systemd? (Y/n) " use_systemd
+[ -z "$use_systemd" ] && use_systemd='yes' # if no input, assume yes
+case ${use_systemd:0:1} in
+   y|Y|1 )
+      use_systemd='yes';;
+   * )
+      use_systemd='no';;
+esac
+
+
+
 echo "Create yubilock user"
 adduser --system --home "$install_dir" --shell "/usr/sbin/nologin" --group --gecos "xscreensaver yubilock daemon" -q 'yubilock' 
 
+
 echo "Making sure python3 and virtualenv are installed"
-python3 --version || apt-get install python3
-python3 -m venv -h >/dev/null 2>&1 || apt-get install python3-venv
+python3 --version || apt-get install -y python3
+python3 -m venv -h >/dev/null 2>&1 || apt-get install -y python3-venv
 
 
 echo "Create virualenv"
@@ -36,6 +85,9 @@ cp "$script_dir/config_example.ini" "$install_dir/config.ini"
 # Remove first line from config
 sed -i '1d' "$install_dir/config.ini"
 
+# Add yubikey serials to config
+[ -n "$serials" ] && sed -i "s+^yubikey_serial\ =.*+yubikey_serial\ =\ $serials+g" "$install_dir/config.ini"
+
 chown -R yubilock:yubilock "$install_dir"
 chown root:yubilock "$install_dir"
 chmod 775 "$install_dir"
@@ -51,7 +103,7 @@ sed -i "s+^logfile\ =.*+logfile\ =\ ${logging_dir}daemon.log+g" "$install_dir/co
 echo "Allow yubilock user access to X host"
 touch "$install_dir/.Xauthority"
 chown yubilock:yubilock "$install_dir/.Xauthority"
-hexkey=`sudo -u link xauth list | cut -d ' ' -f 5`
+hexkey=`sudo -u $username xauth list | cut -d ' ' -f 5`
 export XAUTHORITY="/opt/yubilock/.Xauthority"
 echo sudo -u yubilock xauth add \":0\" . "$hexkey"
 sudo -u yubilock xauth add ":0" . "$hexkey"
@@ -63,10 +115,34 @@ chown root:root '/etc/udev/rules.d/91-usbftdi.rules'
 udevadm control --reload-rules
 
 
-echo "Enable as systemd service"
-cp "$script_dir/debian/yubilock.service" "/etc/systemd/system"
-sed -i "s+^ExecStart=.*+ExecStart=${install_dir}venv/bin/python ${install_dir}xscreensaver_yubilock.py+g" '/etc/systemd/system/yubilock.service'
-systemctl enable yubilock.service
+if [ "$use_systemd" = 'yes' ]; then
+   echo "Enable as systemd service"
+   cp "$script_dir/debian/yubilock.service" "/etc/systemd/system"
+   sed -i "s+^ExecStart=.*+ExecStart=${install_dir}venv/bin/python ${install_dir}xscreensaver_yubilock.py+g" '/etc/systemd/system/yubilock.service'
+   systemctl enable yubilock.service
+else
+   # Make sure service is not previously installed
+   systemctl stop yubilock.service >/dev/null 2>&1
+   systemctl disable yubilock.service >/dev/null 2>&1
+   rm '/etc/systemd/system/yubilock.service' >/dev/null 2>&1
+   rm '/usr/lib/systemd/system/yubilock.service' >/dev/null 2>&1
+   systemctl daemon-reload
+   systemctl reset-failed
+fi
 
+echo "xscreensaver-yubilock is installed!"
+
+if [ "$use_systemd" = 'yes' ]; then
+   echo "Do you wish to start the daemon now? WARNING: If the specified yubikey is not plugged in, your machine will lock. Alternatively, you can start the service using 'sudo systemctl start yubilock.service' or wait for next login."
+   read -p "Start daemon? (y/N) " start_daemon
+   [ -z "$start_daemon" ] && start_daemon='no' # if no input, assume no
+   case ${start_daemon:0:1} in
+      n|N|0 )
+         ;;
+      * )
+         systemctl start yubilock.service;;
+   esac
+fi
 
+exit 0
 #(Uninstall script)