Cannot wake up from the hibernation.

: Ever added the memory?
1.1: Ever added the memory. --> Remove the added memory for a try.
1.1.1: Problem solved. --> Hardware compatible issue.
1.1.2: Problem persists. --> 1.2
1.2: Didn't added the memory. --> Update the BIOS & drivers to the latest version.
1.2.1: Problem solved. --> Software issue.
1.2.2: Problem persists. --> 1.3
1.3: Scan for virus.
1.3.1: Virus found. --> Try to delete the virus by using antivirus software.
1.3.1.1: Problem solved. --> Virus issue.
1.3.1.2: Problem persists. --> 1.4
1.3.2: No virus found. --> 1.4
1.4: Reinstall the OS for a try.
1.4.1: Problem solved. --> OS problem.