did you get a chance to see what the blue screen said? like a error code maybe.
oh but one that for sure try GWScan by western digital it should be able to check for errors of your hard drive http://support.gateway.com/support/drivers/search.asp?param=gwscan
only use the quick test or the full test don't use the write zeros function unless you plan on doing a clean install of windows as a last option. however that is recommended if you can't fix the issue by other means.