diff --git a/server/internal/api/handlers.go b/server/internal/api/handlers.go
index 0f53076..3600e01 100644
--- a/server/internal/api/handlers.go
+++ b/server/internal/api/handlers.go
@@ -124,10 +124,16 @@ func newServer(c *gin.Context) {
 		host, s.ServerID, token,
 	)
 
+	installCmdPS := fmt.Sprintf(
+		`irm "%s/install.ps1?server_id=%s&token=%s" | iex`,
+		host, s.ServerID, token,
+	)
+
 	c.JSON(http.StatusOK, gin.H{
-		"server_id":       s.ServerID,
-		"pre_reg_token":   token,
-		"install_command": installCmd,
+		"server_id":          s.ServerID,
+		"pre_reg_token":      token,
+		"install_command":    installCmd,
+		"install_command_ps": installCmdPS,
 	})
 }
 
diff --git a/web/app/servers/new/page.tsx b/web/app/servers/new/page.tsx
index c0bbf33..a085ad1 100644
--- a/web/app/servers/new/page.tsx
+++ b/web/app/servers/new/page.tsx
@@ -8,15 +8,18 @@ import { Button, Card, CardHeader, CardTitle } from "@/components/ui";
 export default function NewServerPage() {
   const [result, setResult] = useState<NewServerResponse | null>(null);
   const [copied, setCopied] = useState(false);
+  const [os, setOs] = useState<"linux" | "windows">("linux");
 
   const { mutate: createServer, isPending, error } = useMutation({
     mutationFn: api.createServer,
     onSuccess: (data) => setResult(data),
   });
 
+  const command = os === "windows" ? result?.install_command_ps : result?.install_command;
+
   const handleCopy = async () => {
-    if (!result?.install_command) return;
-    await navigator.clipboard.writeText(result.install_command);
+    if (!command) return;
+    await navigator.clipboard.writeText(command);
     setCopied(true);
     setTimeout(() => setCopied(false), 2000);
   };
@@ -65,14 +68,34 @@ export default function NewServerPage() {
                   Valid for 1 hour
                 </span>
               </CardHeader>
+              <div className="mb-4 flex gap-2">
+                {(["linux", "windows"] as const).map((o) => (
+                  <button
+                    key={o}
+                    onClick={() => { setOs(o); setCopied(false); }}
+                    className={`rounded-lg border px-3 py-1.5 text-sm font-medium transition-colors ${
+                      os === o
+                        ? "border-accent bg-accent/10 text-accent"
+                        : "border-border bg-surface-2 text-text-secondary hover:border-accent/40 hover:text-text-primary"
+                    }`}
+                  >
+                    {o === "linux" ? "Linux (bash)" : "Windows (PowerShell)"}
+                  </button>
+                ))}
+              </div>
+
               <p className="mb-4 text-sm text-text-secondary">
-                Run this command on the target server as <code className="rounded bg-surface-2 px-1 py-0.5 text-xs font-mono text-text-primary">root</code>:
+                {os === "windows" ? (
+                  <>Run this in an <strong className="text-text-primary">elevated PowerShell</strong> (Run as Administrator):</>
+                ) : (
+                  <>Run this command on the target server as <code className="rounded bg-surface-2 px-1 py-0.5 text-xs font-mono text-text-primary">root</code>:</>
+                )}
               </p>
 
               <div className="relative rounded-lg border border-border bg-[#0a0c14] p-4 font-mono text-sm">
                 <pre className="overflow-x-auto whitespace-pre-wrap break-all text-text-secondary leading-relaxed">
-                  <span className="text-accent">$</span>{" "}
-                  <span className="text-text-primary">{result.install_command}</span>
+                  <span className="text-accent">{os === "windows" ? "PS>" : "$"}</span>{" "}
+                  <span className="text-text-primary">{command}</span>
                 </pre>
                 <button
                   onClick={handleCopy}
diff --git a/web/lib/api.ts b/web/lib/api.ts
index a78f3ca..6ef54d8 100644
--- a/web/lib/api.ts
+++ b/web/lib/api.ts
@@ -113,6 +113,7 @@ export interface NewServerResponse {
   server_id: string;
   pre_reg_token: string;
   install_command: string;
+  install_command_ps: string;
 }
 
 export interface GenerateKeyOptions {