I have the same problem, though I think I may still have the download link, I just don't recall the file-name to search for it.
I was also concerned if its normal to have no updates since March, as Windows 8.1 has replaced 8.0 as far as Microsoft is concerned, and my machine has randomly blue-screened for most the time I've owned it, though it passes all the tool-box tests (minus the event log chart). I say this as every time I ever told it to check it never found any.
I have the password in my though, that much I am sure of, unless there's more then two (including this forum).
Additionally, the Hard drive replacement and fresh windows 8.1 64bit install was this month, while the errors are less frequent I still get BSOD's frequently with no obvious pattern.
I did submit a support request for this about 40 minutes ago, but between health and classes I might not get a chance to spend time on this again for a while, and I really can't afford afford the time I keep spending on my moms computer,
(As a disabled USAF Vet of 9 years, two tours in Iraq, my time and money are very limited, but I spent almost the entirety of that time as an IT admin of one group of systems or another with frequent loans to train and assist the Help Desk - I'm fairly sure its a hardware - most likely motherboard issue with a couple less likely possibilities).
I don't really have the money to guess-purchase parts, and all my spares are across the country (literally east coast while I'm on West) at my dad's house. (Can't easily bring a tower and parts with you on a plane, and the other half of my equipment is in storage near my last base, in FL, Closer to dad - but still 16 hours drive from him).
Thank you for your time reading this.