Can't go into Sleep mode

Over the last week or so I've been unable to put my PC into Sleep mode. More specifically, whenever I put it into Sleep mode it immediately resumes. Running Powercfg doesn't give any clues - see below:

Code:

powercfg /lastwake Wake History Count - 1 Wake History [0] Wake Source Count - 0

Event Viewer shows these events at the time that I put the machine into sleep mode:

Code:

User-mode process attempted to change the system state by calling SetSuspendState or SetSystemPowerState APIs. The system session has transitioned from 48 to 49. Reason WinRT BootId: 48 The system is entering sleep. Sleep Reason: Application API The browser has forced an election on network \Device\NetBT_Tcpip_{E53951DD-BD2D-4459-A460-C7CCE83042F2} because a master browser was stopped. The browser has forced an election on network \Device\NetBT_Tcpip_{1A0C1417-D501-4800-9376-5CA83614D07D} because a master browser was stopped. Delete URL group 0xFE00000320000068. Status 0x0. Process Id 0x2FB0 Executable path \Device\HarddiskVolume1\Program Files (x86)\GIGABYTE\GService\GCloud.exe, User SYSTEM Create URL group 0xFE00000820000132. Status 0x0. Process Id 0x2FB0 Executable path \Device\HarddiskVolume1\Program Files (x86)\GIGABYTE\GService\GCloud.exe, User SYSTEM Attempted to add URL (http://127.0.0.1:9009:127.0.0.1/) to URL group (0xFE00000820000132). Status: 0x0. Process Id 0x2FB0 Executable path \Device\HarddiskVolume1\Program Files (x86)\GIGABYTE\GService\GCloud.exe, User SYSTEM The system has resumed from sleep. Firmware S3 times. ResumeCount: 1, FullResume: 1761, AverageResume: 1761 Firmware S3 times. SuspendStart: 424359311, SuspendEnd: 424359389