Steam resets download to 0%

Feb 15, 2014
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I've been trying to download Dota 2 via Steam.

The 1st time I reached 900MB, and the next time I turned on the PC the download was at )%

The second time it reached 1.8GB then restarted.

The third time it reached 600MB and it restarted.

The thing is I have restarted my PC, to find the download still continuing, but sometimes it just decides to restart. I have even turned off auto-updates.