Hi @dumisaningwenya
Try the following, one at a time and check if any resolve the problem:
***a).*** Reset Hibernation -
Type cmd in the search box on the Taskbar and select Command Prompt > ''Run as Administrator''
Accept any UAC prompts to open the Command window.
Type the following commands one at a time and ''hit Enter after each command''
powercfg –h off
powercfg –h on
Note: Yes there is a space between some of the characters as shown
Exit the Command window and restart the laptop and check if Hibernation now works OK.
***b).*** Check that all the system files are OK.
In a Command window as above type sfc /scannow and hit Enter and then after the checks have finished restart the laptop in the normal manner and check.