Slow startup on Windows: splash screen appears in more than 20 seconds

Symptoms

  • IDE startup takes more than 20 seconds to show the splash screen for the first time, subsequent start is usually much faster.

  • Antivirus software with the real-time monitor such as Windows Defender is working on the computer.

Cause

Windows Defender slows down IDE startup by scanning its files. The scanning has become much slower recently for the yet unknown reason.

Resolution

Add IDE process to the exclusion list of the installed antivirus. Here are the steps for the Windows Defender:

  1. Go to Start > Settings -> Update & Security -> Virus & threat protection -> Virus & threat protection
  2. Under Virus & threat protection settings select Manage settings
  3. Under Exclusions, select Add or remove exclusions
  4. Select Add exclusion and specify the "idea64.exe" process for IntelliJ IDEA.
Process names to exclude from the antivirus for the other IntelliJ platform based IDEs:
  • webstorm64.exe
  • datagrip64.exe
  • clion64.exe
  • rider64.exe
  • datagrip64.exe
  • goland64.exe
  • phpstorm64.exe
  • pycharm64.exe
  • rubymine64.exe
  • webstorm64.exe
  • studio64.exe
1 comment

I also needed to add an exclusion for "fsnotifier64.exe" so that the startup-windows (which displays the startup progress bar) showed up. I'm not sure if this further accelarted the start-up performance in total.

Edited by elnecsario
1

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