When UE installing this error code IS-BV04 comes

hi
After formatting, one of the first things to do was to download the launcher and install the engine. Problem is the installer errors out with IS-BV04 at about 80%. If I run ue4 from the editor executable it runs perfectly fine, but the launcher doesn’t recognize that, so it makes it hard to install plugins/update/have a quick launcher for my projects, etc.

I spent the last 3 days searching for a solution.

  1. Checking my hard drive as instructed by Epic at the error message. Filesystem is NTFS and there are no bad sectors.
  2. Doing a memtest as instructed by Epic at the error message. No problems found with my RAM.
  3. Specifically opened the ports in my firewall.
  4. Added excception to firewall for Epic Launcher.
  5. Turned off my anti-virus.

Hi did you solve your problem ?
I have the same with 4.25 , 4.26 4.26.1 4.26.2
I posted something here :

https://answers.unrealengine.com/questions/1000281/view.html