Steam an error occurred while updating dota 2
Navigate to your Steam - Repair Folder Sometimes files on hard-disks and other storage devices become corrupted because of bad hardware, software crashes, power surges etc.
You may even need to temporarily disable them for testing purposes.
Sometimes, servers in a specific region may be slow, overloaded or have a hardware failure causing download issues.
It is advisable to temporarily switch to a different download region to use another set of content servers. You may need to test several regions other than your own.
Installing into same location will preserve all installed games. If one is already available, you can create a new Steam library folder on this drive.
You can then install new games into this Steam library folder or move already installed games there.