...in Linux, and I've had it "live" for over 100 days at a time!
That has got to be a really irritating happening. Is this just on webpages, or things open in other programs like text editors and spreadsheet programs? Is it full hibernation where the computer goes off, or rather is it Sleep, where the computer stays on during this time?
http://www.tomsitpro.com/articles/windows-8.1-sleep-hibernation-settings,2-737-3.html
BIOS settings can affect how Sleep and Hibernation works, usually there's a setting between S1 and S3 you can choose.
https://software.intel.com/en-us/blogs/2007/01/10/all-about-system-power-states-s0-s5
You do know that when you "shutdown" windows 8 instead it now goes into "hibernate" mode? I suspect you are speaking of "sleep" mode since you didn't say it was a shutdown.
The one thing that will affect sleep mode quicker than anything is glitchy RAM. It keeps getting refreshed and then glitches, some bits are lost here and there, and suddenly something's not working correctly when it's "woke up". Power fluctuations can do that too, so if those are common where you live, try a power backup unit to keep the flow smoother.
I am having issues when resuming my Dell XPS 15 (Late 2013 edition) from a hibernated state.
When I have many windows open at the same time (for example: 4 browser windows, Microsoft Word, and Excel) and I hibernate my PC, when I eventually proceed take my PC out of its hibernated state I find that the windows that I had opened are no longer responsive. My cursor moves around the screen, I am able to interact with the task bar, and interestingly, I am able to use the Start menu interface and the Metro-style apps without any problems. However I cannot interact with any windows nor their contents when in Desktop mode. This is a very frustrating problem as I regularly place my PC in hibernate mode. More often than not this problem occurs when I try to resume my work, forcing me to restart my PC, losing all my unsaved files and browser pages.
What could the issue be related to? Any advice would be greatly appreciated.
Many thanks in advance.

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