Windows 7 Professional wakes up immediately after putting to sleep

Hey guys. This is my first post here, so Hello. Before you turn away and refer me to the other threads on the same problem, I'd like to tell you that I've checked out every thread, forum and discussion on the topic all over the internet, and no solutions worked for me.

I'm using an Asus K53E laptop (details given below), and I've been using it for a year. Two weeks ago, I reinstalled windows OS, and even then everything was fine. For the last three or four days, however, there's been a problem.

1. When the computer goes to sleep automatically (due to power management settings) it wakes up immediately after that, and then it doesn't go back to sleep on its own.
2. If I put the computer to sleep, it wakes up in the same way, but after it wakes up once if I press sleep again, it works fine. If I wake it up and try putting it to sleep after about 15 minutes, it wakes up immediately again.

Every time, when it wakes up on its own, it does not turn on the screen. It only lights up if I touch the touchpad, and it's on the log in screen.

I've tried all powercfg commands: S3 sleep is activated, devicequery returns no results, last wake says wake source is 0. I've checked power management and sleeping while media sharing is allowed. I've checked device settings and network adapter is not allowed to wake up computer.

Just as a last resort I reinstalled my OS again, because since the last year nothing had gone wrong with it. Right now I only have mozilla firefox installed, and this problem persists even without it, so I'm quite sure it's not a software issue.

Can ANYONE help me with this? This is not a life changer, but it's a habit and having to change that would be really, really annoying. Please let me know as soon as possible.

I'm uploading a screenshot of my powercfg results.


My system:
Windows 7 Professional 64 bit
Intel Core i5 230 GHz
4 gb of RAM

try setting the power settings to 'high performance' set 'turn off display to NEVER and 'put the computer to sleep' to NEVER
check the advanced settings and try setting the following (remember this is just a test-it's my experience that the high performance setting resolves most sleep issues and is most consistent)
1.require password--NO
2.Hard disk-turn off hard disk-NEVER
3. sleep--sleep after-NEVER
4. hibernate after-NEVER
5.allow wake timers-DISABLE
6. power buttons and lid-power button action-SHUT DOWN--sleep button action-SLEEP (some laptops by default sleep when lid is closed)
7.PCI Express-link state power management-OFF
8. Display-turn off display after-NEVER

finally--change your screen saver setting to NONE

test to see if it functions as you desire--tweak settings one at a time and test after each tweak

here are my powercfg results

Thanks man, but I think I found a fix. I had tried all those you suggested before, and they didn't work. But I thought of going through all my drivers once more just in case, and realised the Realtek HD audio manager wasn't properly installed. I reinstalled it and voila! It's fixed