Welch Allyn - Other hardware - Welch Allyn ProBP 3400 Driver 1.9.11.0
by Welch Allyn864-bit32-bitSHA-256 verified
- Manufacturer
- Welch Allyn
- Device
- Welch Allyn - Other hardware - Welch Allyn ProBP 3400
- Driver version
1.9.11.0- Release date
- September 25, 2014
- Supported Windows
- Windows 8
- Architecture
- 64-bit (x64), 32-bit (x86)
- File size
- 123 KB
- File name
20725039_8f578f04bc6a4b3b19e856033e4aff3ee7d8f3ae.cab- Digital signature
- Signed - catalog
wausb.cat - INF version
09/25/2014,1.9.11.0- INF provider
- Welch Allyn
- Device class
- WAUSB
- Source
- Microsoft Update Catalog
- Last verified
- July 8, 2026
- SHA-256
36acce5a989c053b85ca568f6b444646fa5d150c2f1f219c564d8323e55b1714
Supported hardware IDs (9)
- USB\VID_0770&PID_1115
- USB\VID_0770&PID_1040
- USB\VID_0770&PID_1100
- USB\VID_0770&PID_1110
- USB\VID_0770&PID_0450
- USB\VID_0770&PID_1035
- USB\VID_0770&PID_0008
- USB\VID_0770&PID_0100&MI_02
- USB\VID_0770&PID_1111
Compare with your device: Device Manager → right-click the device → Properties → Details → Hardware Ids. If one of the values above matches, this driver supports your hardware.
How to install
- Create a restore point(Start → "Create a restore point" → Create), so you can roll back if anything goes wrong.
- Verify compatibility: your Windows version (Windows 8) and architecture (x64, x86)must match this driver, and your device's Hardware ID should appear in the list above.
- Download the file using the button - it comes directly from Microsoft Update Catalog.
- Optionally verify the checksum: open PowerShell, run
Get-FileHash your-download.cab -Algorithm SHA256and compare with the SHA-256 above. - Extract the .cab archive: right-click → Extract All, or run
expand -F:* file.cab C:\driver\in Command Prompt. - Install via Device Manager: right-click your device → Update driver → Browse my computer → point to the extracted folder. Alternatively run
pnputil /add-driver C:\driver\*.inf /install. - Check Device Manager: the device should show no warning icons, and the driver version should match.
How to roll back
If the device stops working after the update: Device Manager → right-click the device → Properties → Driver tab → Roll Back Driver. If the button is greyed out, use the restore point from step 1 (Start → "Recovery" → Open System Restore).