[AshishSharma]

I've seen this issue occur due to some issue with AntiVirus, where over slow internet connection if the complete file is'nt downloaded within the timeframe the AV causes the system to reboot.
Make sure your AV is up to date and then try again. Also try monitoring the processes working on your computer at the time of download look at the one with High number of threads and I/O operations in that interval.