Dota – Download stuck at 100 mb every time

Identify the "steam app" number (I think DOTA2 is 570)

Find the installscript.vdf file in the game's install folder. Open it with a text editor You will see lines like this:

{...} InstallScript" { "Run Process" { "DirectX" {...}

For every "run process" item like DirectX highlighted above, add a new dword parameter in the registry and set it to 1 in the proper registry node. For Dota2, the app node is:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Valve\Steam\Apps\570

If you using a 32-bit OS, omit Wow6432Node.

You can examine sibling game nodes for more confirmation, but I think once it all runs, steam also adds a dword named "Installed" with a value of 1.

Rarely, an installscript.vdf has a typo (like "DircetX"). I think you need to copy the typo in the registry entry.

This file may be rewritten when steam updates a game. Clearing the contents is a temporary fix.

This is not only dota-2 problem but it happens with every game. Each time a power cut occurs steam starts to download the game files again.

There are two ways to solve your issue -

1. Pause the download:- if you pause the download in progress before the power cut, it will surely resume from the stage you paused it.
2. Restore/backup:- steam also offers another way to your problem. Download from the internet or take a latest backup of dota-2 from your friend in a pen drive and just restore it.