How to Fix Error - After installing Windows 7 Service Pack 1, system no longer goes into Sleep Mode?

After installing Windows 7 Service Pack 1, system no longer goes into Sleep Mode

Since installing the Win 7 service pack 1 my system no longer goes into sleep mode, and when I wake it up it starts as if having been turned off? also when my system is closed down and then when I re-start it I get a screen asking if I wish to start in safe
mode etc
I have not changed any settings or added new hardware, this is due to automatic windows 7 updates, its screwed my system up, thanks Microsoft, I will be disableing future updates, there supposed to help not screw perfectly good working systems?

Keys to the Problem After installing Windows 7 Service Pack 1, system no longer goes into Sleep Mode

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see:
http://windows.microsoft.com/en-AU/windows7/Sleep-and-hibernation-frequently-asked-questions
Perhaps your computer is using hybrid sleep mode?
As for SP1 -
Installing/Uninstalling Service Packs
Troubleshoot problems installing a service pack for Windows 7
http://windows.microsoft.com/troubleshootwindows7sp1
Win7 SP1: Installation tips
http://windowsteamblog.com/windows/b/bloggingwindows/archive/2011/02/16/windows-7-sp1-follow-up.aspx
Steps to follow before you install Windows 7 Service Pack 1 from the Microsoft Download Center
http://support.microsoft.com/kb/2505743
How to uninstall Windows 7 Service Pack 1 (SP1)
http://windows.microsoft.com/en-US/windows7/uninstall-sp1
Learn how to install Windows 7 Service Pack 1
http://windows.microsoft.com/en-US/windows7/learn-how-to-install-windows-7-service-pack-1-sp1
Free unlimited installation and compatibility support is available for issues related to Windows 7 Service Packs.
Availability of chat, phone or e-mail support differs depending on your geographic location.
Some issues may require more advanced support
for which there may be a charge: 
https://support.microsoft.com/oas/default.aspx?&gprid=14496&&st=1&wfxredirect=1&sd=gn

Using Windows troubleshooter:

• Click on Search on Charm bar and type Troubleshooting. Click on the very first option.
• A new window will open. Click View all from the left pane.
• Scroll down to the bottom and click on Windows update.
• Troubleshooter window for Windows update will pop up. Click on NEXT. It may ask you for administrative permission.
• The troubleshooter will automatically detect problems and fix it.
• Now, close this window and try download/install the app which was previously showing error.

Another Safe way to Repair the Problem: After installing Windows 7 Service Pack 1, system no longer goes into Sleep Mode:

How to Fix After installing Windows 7 Service Pack 1, system no longer goes into Sleep Mode with SmartPCFixer?

1. Click the button to download SmartPCFixer . Install it on your computer.  Open it, and it will perform a scan for your computer. The junk files will be shown in the list.

2. After the scan is finished, you can see the errors and problems need to be fixed. Click Fix All.

3. The Fixing part is finished, the speed of your computer will be much higher than before and the errors have been removed.

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