I'm working on a Lenovo G500, running Windows 8.1, and Bitdefender Antivirus Plus 2015. The machine is was purchased new in November 2013 and I use it primarily to do design work (Adobe Creative Cloud) and writing. A little web surfing, social media, etc. - no gaming or anything like that.
The trouble began a few weeks ago: the laptop seemed unable to restart -- I could start it from a completely OFF position, but after an update that required a restart, for example, I'd be stuck in this crazy cycle, with the message "Your PC ran into an error and needs to restart. We're just collecting some info and then we'll restart for you" which it would do - over and over again. Sometimes it wouldn't restart, but land at a page that gave me various repair options (refresh, restart, etc.). It always seemed to be the luck of the draw, until I found I could turn it off, go water the garden, come back and voila - it would turn on and boot into Windows.
Once up and running again, there are no problems -- I have InDesign and Photoshop open, Google drive, Chrome, and I'm flying along doing work.
BUT last night, everything froze up and then it restarted, this time with a message about KERNEL_DATA_INPAGE_ERROR, and telling me where to find the log with the info (which I'll attach for your review). Today, from command prompt, I ran sfc /scannow, with this message at the end: