MXC launcher browser init failure

“MXC launcher: cannot locate required Windows platform directory: HRESULT 0x80070003”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/codex/issues/11137/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Quiet. No reports and thumbs-up in the last two weeks, down from 31 a week at the mid-October peak.

Browser control fails to initialize with MXC launcher HRESULT 0x80070003 on Windows. The node_repl kernel exits with code 1 when cua.getState() or cua.createBrowserTab() is called, before any browser state or tab is returned.

Is this your bug?

File my report

Where: Browser control (CUA)
Error text: MXC launcher: cannot locate required Windows platform directory: HRESULT 0x80070003
Versions: 0.162.0 to 26.1007.71326
Platforms: macOS, Windows
How bad: Some reports say it blocks them completely.

Part of: Browser/Computer Use runtime won't start8 bugs

Browser control fails at startup with sandbox-exec TIOCSTI error19 people
MXC sandbox startup failure11 people
Browser control fails with trusted Node process exiting on Windows5 people
Computer use initialization fails3 people
MXC launcher startup failure3 people
Computer Use startup failure2 people
Node REPL calls time out2 people

Not quite your bug?

Sandbox setup refresh fails308 people

Original reports27, newest first

Oct 16, 2026ChatGPT Plus is unable to access AgentFire WordPress account when signed in with ChatGPT browser.On GitHub#54663
Oct 16, 2026Windows browser control fails before tab access: MXC launcher HRESULT 0x80070003On GitHub#54658
Oct 15, 2026Windows DOT fresh-task browser launch loses SystemDrive after update; local restricted browser worksOn GitHub#54477
Oct 15, 2026Windows: @Chrome fails with “MXC launcher: cannot locate required Windows platform directory” (HRESULT 0x80070003)On GitHub#54338
Oct 15, 2026Windows 26.1007.2314.0: CUA MXC known-folder failure and native Computer Use app-server not foundOn GitHub#54225
Oct 14, 2026Windows app 26.1007.9446.0: CUA MXC 0x80070003 persists; desktop applicability of #54027/#54069 and scoped diagnosticsOn GitHub#54157
Oct 14, 2026Windows Chrome control fails: MXC launcher cannot locate required Windows platform directory (0x80070003)On GitHub#54153
Oct 14, 2026Windows computer control fails to start: MXC launcher HRESULT 0x80070003On GitHub#54116
Oct 14, 2026[Windows] CUA initialization exits before inventory in ChatGPT 26.1007.9446.0On GitHub#54101
Oct 14, 2026Windows delegated CUA: MXC known-folder startup failure before Chrome inventoryOn GitHub#54085

Show all 27Show only the newest 10

Oct 14, 2026[Windows][Codex Desktop] Dot-Delegated CUA Fails with HRESULT 0x80070003 — Missing SystemDrive Environment VariableOn GitHub#53970
Oct 14, 2026Windows: PC and browser control unavailable in Work — MXC 0x80070003On GitHub#53941
Oct 13, 2026Windows Chrome control fails before tab inspection: required platform directory missing (0x80070003)On GitHub#53813
Oct 13, 2026Windows CUA initialization still fails with MXC HRESULT 0x80070003 after desktop app reinstallOn GitHub#53783
Oct 13, 2026Computer and Browser Connection Issues with DotOn GitHub#53735
Oct 13, 2026[Windows] Codex/Dot Computer Use Fails — MXC Launcher HRESULT 0x80070003, CUA Timeouts, Browser Control UnavailableOn GitHub#53694
Oct 13, 2026Windows: delegated browser runtime fails before tab inventory (MXC 0x80070003, then trusted Node exits)On GitHub#53564
Oct 12, 2026Windows browser-control runtime exits before inventory: MXC launcher HRESULT 0x80070003On GitHub#53518
Oct 12, 2026Windows Dot Computer Use fails with MXC HRESULT 0x80070003; local chat worksOn the forum#1405767
Oct 12, 2026[Windows] Work Mode browser CUA initialization still fails after app repair: MXC HRESULT 0x80070003On GitHub#53397
Oct 12, 2026MXC launcher: cannot locate required Windows platform directory: HRESULT 0x80070003.On GitHub#53356
Oct 11, 2026Windows 26.1007: native node_repl tools absent while browser CUA kernel fails in MXCOn GitHub#53255
Oct 11, 2026[Windows] Browser tools fail to initialize: MXC launcher HRESULT 0x80070003On GitHub#53188
Oct 11, 2026Windows 26.1007.21434: browser CUA launcher fails with HRESULT 0x80070003; desktop runtime not exposedOn GitHub#53130
Oct 10, 2026Computer Use fails on Windows — HRESULT 0x80070003On GitHub#52858
Oct 10, 2026Windows browser control fails with MXC platform directory HRESULT 0x80070003 on Desktop 26.1007.2314.0On GitHub#52857
Oct 9, 2026Windows Dots: CUA MXC launcher fails with HRESULT 0x80070003 after direct shell recoveryOn GitHub#52407