Bitdefender Antivirus Free causing BSOD after new update - bdelam.sys

luizc

Hello. In the last version of Bitdefender Antivirus Free, updated today , after restarting my computer, it caused a blue screen (BSOD) looping. I disabled the automatic repair on Windows (with bcdedit), and I saw that the problem is in the antivirus driver (bdelam.sys) - it's missing. I could start my computer after disabling the early-lauch antimalware (ELAM). Maybe the file was excluded from the last version of free antivirus and it's missing at the new version. Anyway, I can't use my computer whithout force-disabling ELAM every restart.

I reported the issue to support and they just advised me that the free version has been discontinued, and that I should uninstall it. This is very strange as the Free Antivirus has just been updated to a brand new version, with a new interface. Anyway, the problem seems to be simple to solve, maybe lauching an update with the missing file... or moving away from it 😓.

Mike_BD

Hello @luizc and welcome to our Community!

Bitdefender Antivirus Free has a completely new iteration, beginning March 17th, as you so attentively have noticed.

My reco is to completely uninstall old version and do a clean new install.

cheers,

Mike

luizc

Hello Mike, the issue was solved moving the bdelam.sys file from Program Files/BitDefender to system32/drivers (changing the folders permission). Thanks!

user01372

Hi Luiz,

I have the same problem and I'm trying to copy bdelam.sys but it won't let me. What permissions did you change and how?

Norris69

Yeah, It is free for me too.

Hejda_P

I had same problem - Bitdefender Internet Security.

I had Windows 10 20H2 (but support from Microsoft is still ok... I think, that is problem from Bitdefender, it will not give information - "Sorry, pleas update your Windows..." Or if it broken, disabled ELAM.

I repaired in (with) method - trial and error , i didnt found any official recomended :( and Windows 10 20H2 is still official support from Microsoft !)

I was very sad and angry, because it was my first instalation of this product (IS) on my computers. It broke me booting, i tried to repair EFI and another, in second step (after repair EFI) i saw this error message. Horrible...

Finally: I repair it myself and from another computer support sent me information: "solution is uninstall Bitdefender (Bitdefender IS uninstall tool) and update Windows and Install cleanly"?.