| ⚠️ Error Type | ✅ Quick Fix | ⏱ Time |
|---|---|---|
| Won’t launch / blank window | Force-quit and relaunch | 30s |
| Stuck on “Indexing…” | Reload window / add .cursorignore | 1min |
| Sign-in fails | Clear session and log in again | 2min |
| Frozen / high CPU | Clear the Cursor cache folder | 5min |
If Cursor — the AI-first code editor built on VS Code — won’t open, freezes, or gets stuck mid-task, you’re not alone. Developers report this daily on Cursor’s forum and Reddit, usually after an update, on very large repositories, or on restrictive corporate networks. (If you actually meant your mouse pointer disappearing on Windows, that’s an OS issue, not a Cursor bug — see the short note in the FAQ below.)
This guide covers the real causes of cursor not working problems in the editor itself: launch failures, frozen UI, stuck indexing, sign-in errors, and runaway CPU usage — plus the fixes that actually resolve them.
What Causes Cursor Not Working
- Corrupted local cache: Cursor’s cache and index data (stored under
%APPDATA%\Cursoron Windows or~/Library/Application Support/Cursoron Mac) can balloon to several gigabytes and start causing freezes or slow startup. - Extension conflicts: A misbehaving VS Code-compatible extension can hang the extension host, freezing the whole editor.
- Network or firewall restrictions: Corporate VPNs and strict firewalls sometimes block the API endpoints Cursor’s AI features rely on, which shows up as sign-in failures or a chat/agent panel that never responds.
- Large workspaces: Indexing a huge repo (or one with
node_modules, build output, or.gitincluded) can leave Cursor stuck on “Indexing…” indefinitely. - Outdated version: Cursor ships frequent updates; an old build can lose compatibility with backend changes and start throwing errors.
Quick Fix — Try This First (30 Seconds)
Closing the window often isn’t enough — Cursor can keep a background process running.
- Open Task Manager (Windows) or Activity Monitor (Mac) and fully end every Cursor process.
- Relaunch Cursor and open the same project.
- If it’s still frozen, try opening a brand-new, empty folder — this tells you whether the problem is Cursor itself or your specific project.
Complete Step-by-Step Fix Guide
- Force-quit and relaunch: Fully kill the process (not just close the window) as above, then reopen.
- Update to the latest version: Help menu → Check for Updates, or download a fresh installer from cursor.com. Many “not working” reports are fixed by simply updating.
- Reload the window: Press Ctrl/Cmd+Shift+P and run “Developer: Reload Window” — this resolves a large share of UI freezes without a full restart.
- Clear the cache folder: Quit Cursor completely, then delete the Cache and CachedData folders inside its app-data directory (leave Settings/keybindings alone so you don’t lose your config).
- Sign out and back in: Account menu → Sign Out, restart Cursor, then sign in again. This fixes most “Failed to create agent” and chat-not-responding errors.
- Disable extensions: Open the Extensions panel, disable everything, restart, then re-enable one at a time to find the conflicting one.
- Check your network: If you’re on a work VPN or firewall, ask your IT team to allow cursor.com and its API subdomains — blocked requests look exactly like a broken app.
Advanced Fixes
Full reset (last resort): Uninstall Cursor, then remove its leftover data before reinstalling:
# Windows (PowerShell)
Remove-Item -Recurse -Force "$env:APPDATA\Cursor"
# macOS
rm -rf ~/Library/Application\ Support/Cursor
# Linux
rm -rf ~/.config/CursorIndexing stuck forever: Add a .cursorignore file to your project root excluding node_modules, build folders, and .git — large binary or generated files are the most common cause of indexing that never finishes.
“Failed to create agent” errors: Almost always an expired or blocked session. Sign out, clear cookies for cursor.com in case you also use it in-browser, and sign back in.
Still Not Working? Try These Instead
- VS Code + GitHub Copilot: The closest free alternative, with mature, stable tooling.
- Windsurf: Another AI-first editor with a similar agent-based workflow.
- Zed: Extremely fast, lightweight, with growing AI features.
FAQ
Is Cursor down right now? Check status.cursor.com for live incident reports before troubleshooting locally — if it’s a backend outage, no local fix will help.
Why is Cursor stuck on “Indexing…”? Usually a large or messy repository. Add a .cursorignore file excluding node_modules, build artifacts, and .git, then reload the window.
Why won’t Cursor sign in? An expired session or a network/firewall block are the two most common causes. Sign out fully and retry on a different network to isolate which one it is.
My mouse cursor (pointer) isn’t moving — is that the same issue? No — that’s a Windows or driver problem, unrelated to the Cursor app. Update your mouse driver in Device Manager and uncheck “Enhance pointer precision” in Control Panel → Mouse settings.
Cursor keeps crashing outright? See our dedicated Cursor AI keeps crashing guide for crash-specific fixes.
Getting a specific error code or message? Check our Cursor AI error guide for fixes by exact error.
Related Guides
