How to Update Power Management Drivers on a Laptop. The System window appears. Open the Device Manager. In Windows 7 and Vista. Intel Power Management Driver Slows. The entire system is slow. The Windows 8.1 upgrade is. Is no driver available post Windows 7. How to Update Power Management Drivers on a Laptop. The System window appears. Open the Device Manager. In Windows 7 and Vista.
Most often, power management issues are resolved by obtaining the latest version of your laptop’s ACPI power management software, or device driver. Ensuring that you have the latest version is something you should do; the Windows Update program may not look for new power management software for you.
The easy way to check for new power management software is to follow these steps:
Press Win+Break.
The System window appears.
Open the Device Manager.
In Windows 7 and Vista, click the link on the left side of the window: Device Manager. In Windows Vista, also click Continue or type the administrator’s password.
In Windows XP, click the Hardware tab. Then click the Device Manager button.
Click the plus sign (+) next to System Devices.
Right-click Microsoft ACPI-Compliant System.
Choose Update Driver Software.
Heed the instructions onscreen.
Also try repeating these directions, but use the item titled Microsoft ACPI-Compliant Embedded Controller in Step 5. (Indeed, you can choose any item with ACPI in it if it seems to be the source of trouble, such as the ACPI Lid item when you’re having issues with the laptop not sleeping when you close the lid.)
If this method doesn’t work, you must visit the laptop manufacturer’s website. Search the Support section for your PC’s make and model for any new power management drivers.
Do not remove any ACPI entries, because doing so may disable some of your laptop’s power management features, such as the ability to sleep the laptop by pressing the Power button. It’s a real pain to reinstall these features.
I'm wondering if anyone else has had this problem, and where it's going to get fixed in the future.
Windows 8.1 and Windows 10 has been extremely slow on my laptop, and the cause of it apears to be the Intel Power Management driver. There are no problems with the initial Windows 8 installation. When installing the Windows 8.1 upgrade from the store, the computer restarts and takes hours to complete. After the installation, it takes on the order of 10s of minutes to get to the windows desktop. Opening Task Manager, i see that the CPU is running at 0.2 GHz and won't go higher; the CPU is saturated so the entire system is slow.
The Windows 8.1 upgrade is performed on a clean install of Windows 8 Pro. No third-party software was installed. No Windows Store Apps were installed. (The only update before the upgrade is KB2871389 - the only requirement for the upgrade.)
The same appears to occur on a fresh install of Windows 10. (Installation, boot, and windows are all slow.)
After searching all over online, I found a solution - disable the the service associated with intelppm.sys. There are 2 methods presented:
1. Edit the registry (HKEY_LOCAL_MACHINESYSTEMCurrentControlSetservicesintelppmStart = 4)
2. Execute 'sc config intelppm start= disabled'
They both do the same thing.
Power Management System Driver
After restarting the computer, it works at normal speed. Sometimes an automatic update updates the driver again and the setting needs to be changed again. There appears to be a bug in the Intel Power Management driver introduced some time after Windows 8. Windows 7 works fine even with all the windows updates installed.
For reference, the specs of this computer are:
Asus Power Management System Driver
Intel Mobile Core 2 Duo T5500 @ 1.66GHz (MMX, SSE, SSE2, SSE3, SSSE3, Intel 64, NX, VMX)
i945GM Chipset, 82801GHM (ICH7-M/U) Southbridge
I suspect that Windows is doing something SpeedStep that causes this problem. There unfortunately isn't any option in the BIOS to disable SpeedStep.
Base System Driver Windows 7
Thanks for your time.