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Coexistence

Start beside Microsoft Defender. Consolidate when you’re ready.

Many teams already have Defender through Microsoft 365. 1stProtect runs beside it in user mode and stops credential theft, EDR killers and harmful actions before they complete. Once it’s proven on your devices, retire the paid EDR licences and point tools it covers.

Set up beside Defender.

Three steps, done once. The entries cover every 1stProtect version.

  1. Install 1stProtectUnder 10 minutes per device, with no reboot. Defender keeps running throughout.
  2. Nothing to add in DefenderThe installer adds C:\Program Files\1stProtect, C:\ProgramData\1stProtect and the process entry C:\Program Files\1stProtect\*\*.exe.
  3. Only if Defender is managed centrallyIf Intune or Group Policy turns off local exclusion merging, add the same three entries there.

What 1stProtect stops before it completes.

Defender detects and responds. 1stProtect stops these steps before they complete.

  • Credential theft. Blocked before the read completes. CredentialProtect
  • Trusted tools running hidden scripts. Blocked before the script runs. ExecutionProtect
  • Reverse shells. Blocked before the channel opens. ShellProtect
  • EDR killers. The driver is stopped from loading. DriverProtect
  • Unhooking and blinding. Stopped before the hooks are removed. PayloadProtect
  • AI agents acting as you. Each action judged by policy. AIControl

When you’re ready to switch.

Run both while you prove it. Then retire Defender on your terms.

  1. Enforce across a pilot groupSwitch on prevention and run both side by side until the results match what you expect.
  2. Map what you’ll retireYour partner and the Stack Builder show which paid Defender add-ons and point tools 1stProtect covers, and what to check first.
  3. Retire them at renewalDrop the licences 1stProtect makes redundant on your schedule. 1stProtect keeps protecting throughout.

No second kernel driver

1stProtect runs in user mode, so there’s nothing competing with Defender’s sensor at the kernel level.

No duplicate data feed

1stProtect reports only the events that matter, to its own console and to your SIEM if you choose.

Priced to replace

From $30 per device a year. Compare it with your next Defender renewal. See plans

Microsoft Defender is a trademark of its owner. 1stProtect is not affiliated with or endorsed by it. Entries from the 1stProtect exclusion guide v2.3, reviewed against vendor documentation, October 2026.

Start beside Defender. Switch at renewal.

Run 1stProtect free for 30 days on up to 10 devices that already run Defender. Nothing is blocked until you switch it on.

Get free trial