Offline AI on shared home computers
Shared home PCs mix accounts and data. An offline AI USB keeps prompts and outputs separate, with no cloud logins or telemetry.
No shared cloud accounts or history mixing.
Runs locally in guest sessions from a USB.
Easy to unplug and store when done.
Who this is for / not for
For households and roommates sharing PCs who still want private AI sessions. Not for users who already have individual dedicated devices.
- Useful for families, roommates, and temporary guests.
- Skip if every user already has a private laptop.
Specs that actually matter
Windows 10/11 or macOS with 8–16 GB RAM and USB 3.0 works. GPU optional. Enable disk encryption on the host.
- Use the fast preset on older family PCs.
- Keep 4–6 GB free disk space.
- Use a direct port; avoid front-panel hubs if unreliable.
Private shared-PC workflow
Plug in, launch, and run in a user account or guest mode. Keep prompts and outputs on the USB. Unplug when finished to remove access.
- Store personal prompt packs on the USB, not the PC.
- Run in airplane mode to prevent accidental syncs.
- Back up the drive to your own encrypted storage.
Common pitfalls
Leaving outputs in Downloads. Sharing the USB without guidance. Updating while someone else is using the PC heavily.
- Clear cache and downloads after each session.
- Label the drive and set simple rules for use.
- Update when the PC is idle and on AC power.
PortableMind vs DIY
DIY installs clutter shared PCs and risk leaving traces. PortableMind is plug-and-run and leaves minimal footprint after you unplug.
- No installs or cloud accounts mixed between users.
- Easy to store securely when not in use.
Keep privacy intact
Set expectations with housemates, keep the USB in a safe spot, and back it up. Use separate folders for each person if sharing.
- Create per-user folders on the USB.
- Use incognito windows if on shared user profiles.
- Rotate backups so one loss doesn’t wipe everyone’s work.
Quick cross-links
Hop to related guidance while you keep this page open.
FAQ
Will other users see my prompts?
Keep everything on the USB and clear browser cache after use to avoid traces.
Do we need accounts?
No accounts or API keys are required.
Can kids use it?
Only under supervision. Set rules and keep the drive stored when not in use.
Does it work offline?
Yes. It runs locally with no internet required.
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