diff --git a/flake.lock b/flake.lock
index 4c1fff1..aef38d2 100644
--- a/flake.lock
+++ b/flake.lock
@@ -60,11 +60,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1766292113,
-        "narHash": "sha256-sWTtmkQujRpjWYCnZc8LWdDiCzrRlSBPrGovkZpLkBI=",
+        "lastModified": 1766553861,
+        "narHash": "sha256-ZbnG01yA3O8Yr1vUm3+NQ2qk9iRhS5bloAnuXHHy7+c=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "fdec8815a86db36f42fc9c8cb2931cd8485f5aed",
+        "rev": "0999ed8f965bbbd991437ad9c5ed3434cecbc30e",
         "type": "github"
       },
       "original": {
@@ -94,11 +94,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1766201043,
-        "narHash": "sha256-eplAP+rorKKd0gNjV3rA6+0WMzb1X1i16F5m5pASnjA=",
+        "lastModified": 1766473571,
+        "narHash": "sha256-5G1NDO2PulBx1RoaA6U1YoUDX0qZslpPxv+n5GX6Qto=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "b3aad468604d3e488d627c0b43984eb60e75e782",
+        "rev": "76701a179d3a98b07653e2b0409847499b2a07d3",
         "type": "github"
       },
       "original": {
@@ -207,11 +207,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1766410104,
-        "narHash": "sha256-Eh+TUdb4CGscBLG3Q6QOQOjEdPCmHPClGyeHf4F67Mk=",
+        "lastModified": 1766614843,
+        "narHash": "sha256-upUQfQv7Xiy5IZzfsVOL0lH4A/wuUQjG2jlzmBmVuwU=",
         "owner": "0xc000022070",
         "repo": "zen-browser-flake",
-        "rev": "eaff1bc54b9a8bd698c2dc47823400460e9f38a0",
+        "rev": "b01d17acbec3d1b76fecf500289d8509da202585",
         "type": "github"
       },
       "original": {
diff --git a/home-manager/modules/programs.nix b/home-manager/modules/programs.nix
index a986765..4297953 100644
--- a/home-manager/modules/programs.nix
+++ b/home-manager/modules/programs.nix
@@ -36,7 +36,22 @@
   programs.direnv.enableZshIntegration = true;
 
   imports = [ inputs.zen-browser.homeModules.twilight ];
-  programs.zen-browser = { enable = true; };
+  programs.zen-browser = { 
+    enable = true;
+    #profiles."Default Profile" = {
+    #  search = {
+    #    default = "Perplexity";  # Use the ID of your custom engine below
+        #engines = {
+          #"perplexity" = {     # Custom engine ID (lowercase, no spaces)
+          #name = "Perplexity";
+          #urls = [{
+          #  template = "https://www.perplexity.ai/search?q=%s";
+          #}];
+          #definedAliases = [ "@per" ];
+        #};
+     # };
+    #};
+  };
 
   xdg.mimeApps = let
     value = let
diff --git a/hosts/fenrir-nixos/configuration.nix b/hosts/fenrir-nixos/configuration.nix
index bc74bb9..bd2dc84 100755
--- a/hosts/fenrir-nixos/configuration.nix
+++ b/hosts/fenrir-nixos/configuration.nix
@@ -21,4 +21,9 @@
     modesetting.enable = true;
   };
 
+  environment.systemPackages = with pkgs; [
+    efibootmgr
+    (writeShellScriptBin "win" (builtins.readFile ./load_into_windows.sh))
+  ];
+
 }
diff --git a/hosts/fenrir-nixos/load_into_windows.sh b/hosts/fenrir-nixos/load_into_windows.sh
new file mode 100644
index 0000000..344e3ff
--- /dev/null
+++ b/hosts/fenrir-nixos/load_into_windows.sh
@@ -0,0 +1 @@
+sudo efibootmgr --bootorder $(sudo efibootmgr | grep Windows | awk '{print $1}' | sed 's/Boot//g' | sed 's/\*//g' | tr -d '\n') && sudo reboot
diff --git a/hosts/loki-nixos/configuration.nix b/hosts/loki-nixos/configuration.nix
index 1114f83..ba86645 100644
--- a/hosts/loki-nixos/configuration.nix
+++ b/hosts/loki-nixos/configuration.nix
@@ -12,4 +12,22 @@
   }];
   boot.resumeDevice = "/dev/nvme0n1p2";
 
+  # --- Temp sections for testing purposes ---
+  # services.pipewire = {
+  #   enable = true;
+  #   alsa.enable = true;
+  #   pulse.enable = true;
+  #   alsa.support32Bit = true;
+  # };
+
+  # environment.systemPackages = with pkgs; [
+  #   pavucontrol
+  #   qpwgraph
+  #   paprefs
+  #   helvum
+
+  # ];
+
+  # programs.dconf.enable = true;
+
 }
diff --git a/nixos/custom.nix b/nixos/custom.nix
index b324e23..110d3fe 100644
--- a/nixos/custom.nix
+++ b/nixos/custom.nix
@@ -35,4 +35,12 @@
     shell = pkgs.zsh;
   };
 
+  services.upower.enable = true;
+  hardware.bluetooth.enable = true;
+
+  environment.systemPackages = with pkgs; [
+    (writeShellScriptBin "power_max" (builtins.readFile ./scripts/max.sh))
+    (writeShellScriptBin "power_min" (builtins.readFile ./scripts/min.sh))
+  ];
+
 }
diff --git a/nixos/scripts/max.sh b/nixos/scripts/max.sh
new file mode 100755
index 0000000..eaee8e0
--- /dev/null
+++ b/nixos/scripts/max.sh
@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+
+# выйти при ошибке
+set -e
+
+# нужно запускать от root:
+if [[ $EUID -ne 0 ]]; then
+  echo "Этот скрипт нужно запускать от root (sudo)."
+  exit 1
+fi
+
+CPU_PATH="/sys/devices/system/cpu"
+
+# обрабатываем все CPU: cpu0, cpu1, ...
+for cpu_dir in "$CPU_PATH"/cpu[0-9]*; do
+  gov_file="$cpu_dir/cpufreq/scaling_governor"
+  min_file="$cpu_dir/cpufreq/scaling_min_freq"
+  max_file="$cpu_dir/cpufreq/scaling_max_freq"
+  avail_max_file="$cpu_dir/cpufreq/cpuinfo_max_freq"
+
+  # если cpufreq не поддерживается этим ядром, пропускаем
+  [[ -e "$gov_file" ]] || continue
+
+  # включаем governor performance
+  echo performance > "$gov_file"
+
+  # ставим минимальную и максимальную частоты в максимально допустимый диапазон
+  if [[ -r "$avail_max_file" ]]; then
+    #max_freq=$(cat "$avail_max_file")
+    max_freq=3800000
+    echo "$max_freq" > "$max_file" 2>/dev/null || true
+    echo "$max_freq" > "$min_file" 2>/dev/null || true
+  fi
+
+  echo "Настроен $(basename "$cpu_dir"): governor=performance, max_freq=$(cat "$max_file" 2>/dev/null)"
+done
+
+echo "Готово. Ограничения частоты (в пределах допуска CPU/BIOS) сняты."
+
diff --git a/nixos/scripts/min.sh b/nixos/scripts/min.sh
new file mode 100755
index 0000000..d468cfc
--- /dev/null
+++ b/nixos/scripts/min.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+# выйти при ошибке
+set -e
+
+# нужно запускать от root:
+if [[ $EUID -ne 0 ]]; then
+  echo "Этот скрипт нужно запускать от root (sudo)."
+  exit 1
+fi
+
+CPU_PATH="/sys/devices/system/cpu"
+
+# обрабатываем все CPU: cpu0, cpu1, ...
+for cpu_dir in "$CPU_PATH"/cpu[0-9]*; do
+  gov_file="$cpu_dir/cpufreq/scaling_governor"
+  min_file="$cpu_dir/cpufreq/scaling_min_freq"
+  max_file="$cpu_dir/cpufreq/scaling_max_freq"
+
+  # если cpufreq не поддерживается этим ядром, пропускаем
+  [[ -e "$gov_file" ]] || continue
+
+  # включаем governor performance
+  echo performance > "$gov_file"
+
+  # ставим минимальную и максимальную частоты в максимально допустимый диапазон
+  if [[ -r "$avail_max_file" ]]; then
+    max_freq=800000
+    min_freq=400000
+    echo "$max_freq" > "$max_file" 2>/dev/null || true
+    echo "$min_freq" > "$min_file" 2>/dev/null || true
+  fi
+
+  echo "Настроен $(basename "$cpu_dir"): governor=performance, max_freq=$(cat "$max_file" 2>/dev/null)"
+done
+
+echo "Готово. Ограничения частоты (в пределах допуска CPU/BIOS) сняты."
+
diff --git a/proc.sh b/proc.sh
deleted file mode 100755
index 8542ff2..0000000
--- a/proc.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-grep "cpu MHz" /proc/cpuinfo | head
-
-# попробовать поднять лимит на всех ядрах
-for c in /sys/devices/system/cpu/cpu[0-7]; do
-  echo 4100000 | sudo tee "$c/cpufreq/scaling_max_freq"
-done
-
-# проверить, применилось ли
-grep "cpu MHz" /proc/cpuinfo | head
-sudo tlp-stat -p | sed -n '1,25p'
\ No newline at end of file
diff --git a/proc_min.sh b/proc_min.sh
deleted file mode 100755
index 8926b3c..0000000
--- a/proc_min.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-grep "cpu MHz" /proc/cpuinfo | head
-
-# попробовать поднять лимит на всех ядрах
-for c in /sys/devices/system/cpu/cpu[0-7]; do
-  echo 800000 | sudo tee "$c/cpufreq/scaling_max_freq"
-done
-
-# проверить, применилось ли
-grep "cpu MHz" /proc/cpuinfo | head
-sudo tlp-stat -p | sed -n '1,25p'
\ No newline at end of file