Windows fails to resume from hibernation every other reboot
Solution 1:
We have a lot of Dell computers (desktops and laptops both) that have this problem, with hibernate and sleep. For some, it was a graphics driver, for others it was a storage device driver. The installed driver wasn't necessarily the wrong one, but using a different version of the driver corrected the problem. Best of luck to you..
Solution 2:
To what was said above you need to check your hard drive for surface and file system errors. hiberfil.sys has a big size and can be often corrupted in case of bad sectors.
To check the file system use chkdsk: e.g. chkdsk c: /f /r
To check the HDD surface use tools like HDDScan or HDTune. They allow to read and verify the surface for bad or slowly-read sectors (that are close to become bad).