My parents' computer wakes instantly when put to sleep. It spins down and then starts a second later.
There are no devices set to wake, lastwake gives no information, eventvwr is empty, and the power profile does not allows scheduled tasks to wake it from sleep.
C:\Users\User>powercfg -devicequery wake_armed C:\Users\User>powercfg -lastwake Wake History Count - 1 Wake History  Wake Source Count - 0
This seems to have started after a recent thunderstorm. It apparently fried the NIC which was not working. I disabled it in the BIOS and added a USB WIFI adapter. Is it possible that physical damage is signalling the computer to wake? Would this be fixable? The computer is old but more than adequate for their needs.