On BoUoW Antimalware Service Executable goes hot when trying to do an npm install and slows down npm install

[sandeepzgk]

• Description
  I run Bash on administrative mode (to get ping access and other needs for elevation), and recently ive noticed that npm installs takes much much longer than before and trying to investigate it, i couldnt find the root cause but Antimalware service runs hot. Actually it takes more of my CPU than node.

• Expected results
  Ideally it should be a smooth running and not taking up so much CPU cycles.

• Actual results (with terminal output if applicable)
  

• Your Windows build number
  14393.693 / 14.04.5 LTS

• Steps / All commands required to reproduce the error from a brand new installation
  command run: ng new testapp

• Strace of the failing command
  runs as expected, but causes other concerns.

• Required packages and commands to install
  Node:6.9.5
  NPM: 3.10.10
  @angular/cli: 1.0.0-beta.32.3

[bmayen]

Try excluding bash.exe and Windows\System32\lxss from Windows Defender

[Gabrielcarvfer]

Same thing happens with Windows installers. Disable Windows Defender real-time protection and try again.

[heldchen]

excluding bash.exe / the lxss folder(s) does not help as Windows Defender seems to be scanning the actual processes within BOW (build 15042), for example during some apt-get install-postprocessing

[megakoresh]

1 year later same issue. Please look into this, there is no Github issues for Windows Defender to post this to.

This affects ALL commands that download and install something from the internet btw, apt install/update/upgrade, pip install, gem install etc.

[danilaml]

Can Windows Defender even defend against stuff from WSL? Does it need to? Is there a purpose? Obviously a native linux application can't be a windows virus (though it's probably possible to create one that might try to read/corrupt sensitive info).

[gaving]

Anybody out there? My 45 minute yarn install is caused by this. 😭

[gaving]

Related:- #1932