There are many reasons this can happen, and unfortunately very difficult to pinpoint the issue in a particular case.
1. In your system BIOS there is usually two sleep mode (power states) you can select. It is Usually set to S3, change it to S1 (or vice versa), and disable wake on LAN (if available) unless you need it
2. Attempt a clean boot and see if some background startup item or service is causing the issue. see
this article for troubleshooting startup items
3. Make sure you drivers (especially chipset, network, video and sound) and BIOS are up to date.
4. Disconnect as many things as you can (boot with just your keyboard, mouse and monitor) try a different mouse and keyboard.
I hope you find the cause, also check in Event Viewer to see if there are corresponding errors
×