An error occurred while updating dota 2 disk read error


The Steam installer can be downloaded here: ( and reinstalled to the same location where it is already installed.

This may fix potential issues with Steam client and service files. It can be very helpful to test the issue by installing on an alternate hard drive.

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You may even need to temporarily disable it for testing purposes.

It may be necessary to add exceptions in your firewalls for Steam.

Any software that modifies or monitors system, disk or network activity can cause issues while downloading or running a game.

These programs and services can run in the background and are typically associated with software like Anti-Virus, ad-blockers, web-optimizers, firewalls, system cleaners, recording software, proxies, performance boosters etc.

You'll want to work with a tech support specialist to ensure that your AV software is not interfering with Steam.