11: Bcm2045a0 Driver Windows

Here’s a ready-to-use forum-style post to help others (or yourself) find and install the BCM2045A0 driver on Windows 11. This chip is commonly found in Bluetooth/Wi-Fi combo cards (e.g., in older Dell, HP, or Lenovo laptops).

Title: SOLVED – BCM2045A0 driver for Windows 11 (Broadcom Bluetooth)

Post:

Hey everyone,

I struggled to get the BCM2045A0 (Broadcom) Bluetooth adapter working properly on Windows 11. Windows Update didn’t automatically find a working driver, and the device showed a yellow exclamation mark in Device Manager.

After a few hours of trial and error, here’s what finally worked for me.

For HP Laptops:

1. Go to HP Software & Driver Downloads.
2. Enter your product number (e.g., EliteBook 840 G3).
3. Filter by Driver – Network.
4. Look for "Broadcom Bluetooth Driver" (often labeled "BCM2045").
5. Download and install.

🚨 Common Issues & Fixes

| Issue | Solution | |-------|----------| | Driver code 10 / 43 | Disable → Enable device in Device Manager. Uninstall device → scan for hardware changes. | | Bluetooth missing after update | Run services.msc → set "Bluetooth Support Service" to Automatic → restart. | | Can't pair devices | Remove all paired devices → restart Bluetooth service → re-pair. | bcm2045a0 driver windows 11

Q2: Can I use Windows 10 drivers on Windows 11?

Yes. Most v12.x Broadcom drivers for Windows 10 work perfectly on Windows 11. Use compatibility mode if the installer blocks.

Method 3: Manual Driver Update via Device Manager (No Installer)

If you have a .inf driver folder instead of an executable:

1. Download the driver package from your OEM’s website. Extract the .zip file to a folder like C:\Drivers\BCM.
2. Open Device Manager (right-click Start button).
3. Locate BCM2045A0 (likely under "Other devices" with a yellow triangle).
4. Right-click → Update driver → Browse my computer for drivers.
5. Click Let me pick from a list of available drivers on my computer.
6. Click Have Disk → Browse.
7. Navigate to the extracted folder and select the .inf file (usually bcbtums.inf or btfilter.inf).
8. Click Open → OK.
9. Choose Broadcom Bluetooth Driver from the list → Next.
10. Ignore the "This driver is not digitally signed" warning (Windows 11 may block it – see troubleshooting below).

Where to get drivers

• Manufacturer support page for your laptop or USB adapter model (preferred).
• Broadcom/Widcomm driver packages distributed by OEMs.
• Windows Update (automatic).
• Reputable driver-download sites only when OEM sources are unavailable (exercise caution).

What is the BCM2045A0 Driver?

First, let’s decode the name. BCM2045A0 refers to a Bluetooth radio chipset manufactured by Broadcom (now owned by Cypress Semiconductor / Infineon). This chip is commonly found in: Here’s a ready-to-use forum-style post to help others

• Dell Latitude and XPS laptops (especially 3000, 5000, 7000 series)
• HP EliteBook and ProBook models
• Lenovo ThinkPad T/X/L series (2015–2018 era)
• Older ASUS and Acer ultrabooks
• Some PCIe Bluetooth/Wi-Fi combo cards like the Dell Wireless 1707, 1802, 1820A, and Atheros/Qualcomm-based modules.

The BCM2045A0 is not a standalone driver name but rather a hardware identifier that Windows uses to load the correct Bluetooth stack. Without the proper driver, your system will either fail to detect Bluetooth devices or show the adapter as "unidentified."

The Windows 11 Wrench

Windows 10 and 11 have native Broadcom Bluetooth drivers built-in. So why doesn't Windows 11 just handle it? Two reasons:

1. Driver Signing & Updates: Windows 11 has stricter driver signing policies. Older, unsigned, or poorly packaged Broadcom drivers from 2015–2018 are blocked. Microsoft wants you to use the Windows Update catalog or the OEM’s (Original Equipment Manufacturer) modern package.
2. The "Generic Bluetooth Radio" Trap: Often, Windows 11 will install a working driver, but it will name it "Generic Bluetooth Radio" or "Microsoft Bluetooth Enumerator." The leftover "BCM2045A0" entry is a phantom—a device that was partially installed but never completed enumeration. Uninstalling it and rescanning often makes it vanish.

✅ Final check

Once installed, your Bluetooth should work with headphones, mice, etc. Device Manager will show:
Broadcom Bluetooth 4.0 USB Device (or similar) – driver provider: Broadcom, date: 2016 or later. Title: SOLVED – BCM2045A0 driver for Windows 11

Hope this saves someone else the headache!

– posted from a resurrected Windows 11 machine with working BCM2045A0 Bluetooth 🎉