# Reinstall iisnode - Step by Step

## Current Issue
iisnode error 0x00000002 - can't execute Node.js

## Solution: Reinstall iisnode

### Step 1: Uninstall Current iisnode
1. Control Panel → Programs → Uninstall
2. Find "iisnode" → Uninstall
3. Or manually remove from: `C:\Program Files\iisnode`

### Step 2: Download Fresh iisnode
- Go to: https://github.com/Azure/iisnode/releases
- Download: **iisnode-full-v0.2.26-x64.msi** (or latest x64 version)
- Make sure it's **x64** (not x86)

### Step 3: Install
1. Run the .msi file as Administrator
2. Follow installation wizard
3. Make sure "Register iisnode with IIS" is checked

### Step 4: Restart
- Restart IIS: `iisreset`
- Or restart computer

### Step 5: Verify Installation
1. Check: `C:\Program Files\iisnode\iisnode.dll` exists
2. IIS Manager → Server → Modules → Should see "iisnode"
3. Test with hello.cjs

### Step 6: If Still Error
Check Node.js version compatibility:
- iisnode v0.2.26 works with Node.js 12-18
- If Node.js 19+, might need newer iisnode version

## Alternative: Try Without nodeProcessCommandLine
Sometimes letting iisnode find Node.js automatically works better.

Remove from web.config:
```xml
nodeProcessCommandLine="C:\Program Files\nodejs\node.exe"
```

Let iisnode use PATH to find Node.js.