Usually, the Bthmodem.sys Blue Screen of Death is triggered by problems with Bluetooth modem driver.
If you are bothered by it, dont worry.
This post onMiniTool Websitewill provide you with some viable solutions to fix easily.

Bthmodem.sys BSOD
The Bthmodem.sys file refers to Microsoft Windows Bluetooth communication system driver file.
The Blue Modem Communication driver allows your setup to communicate with your Bluetooth machine.
Blue Screen of Death like Bthmodem.sys BSOD may lead to accidental system crashes, data loss and other problems.
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Once anything goes wrong, you’re free to use the backups to restore them with ease.
If this is the case, you could initiate the combination of SFC and DISM to repair these files.
PressWin+Sto evoke thesearch bar.

Typecmdto locateCommand Promptand right-hit it to chooseRun as administrator.
In the black console, typesfc /scannowand hitEnter.
Reboot your box and initiate the following command one by one.

DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth
What is DISM error 0x800f081f?
Why do you get this error?
How to remove it from your setup?
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If you are curious about them, continue to read this post now!
Therefore, see to it to update the driver in time:
Step 1.
Right-tap on thestarticon to chooseDevice Manager.

ExpandBluetoothto find your blue tooth machine and right-punch it to chooseUpdate driver>Search automatically for drivers.
After the latest driver is installed, reboot your setup to see if Bthmodem.sys is still there.
To do so:
Step 1.
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RunCommand Promptwith administrative rights.
Step 2. pop in the following command and dont forget to hitEnter.
sc config BTHMODEM start= demand
Step 3.
To rule out this possibility, you could run a comprehensive scan with Windows Defender:
Step 1.
Go toUpdate & Security>Windows Security>Virus & threat protection.
Click onScan options> tickFull scan> pressScan nowto start a full scan of your rig.
Check how to run Windows/Microsoft Defender full/quick/custom/offline scan to scan for malware or virus on your Windows 10/11 computer.
In theSystem Restorewindow, hitNext.
Selecta restore pointand hitNext>Finish.
What if you receive the error System Restore has been turned off by your system administrator in Windows 10/11?
Find fixes from this post now.