have to re-download games

[Ltsmith4]

Games that I have already downloaded on steam, often disappear. I have downloaded one game probably 7 times now as occasionally when I go to play on it, it starts a download rather than opening the game. I also just had a windows error, blue screen shut down. Could my drives be going bad? My OS (windows 7 home premium) is on my ssd and everything else is on my hard rive . This also happens a lot with my Geforce applications. Any advice would be appreciated, this was built Nov 2015 so it's not that old.
SSD - Crucial MX100 256GB
Hard Drive - WD Black Series WD10003FZEX 1TB 7200 RPM 64MB cache SATA 6.0Gb/s

 

[smorizio]

run wd vendor test tool use hdtune to read drive smart info. run memtest86 to check for bad ram. use hardwareinfo 64 bit set it to sensor and logging to watch power supply rails.