Archive for April 2010

Windows 7 DWM (dwm.exe) High CPU Performance Issues

On this system, I’m blessed with a triple-headed setup: I have three nice LCD monitors on my desktop which create a panoramic view of my terminal screens. I’m also cursed with Windows 7 and it’s [many] flaws. Lately, I’ve been having an issue with Windows 7’s Desktop Window Manager (DWM, shown as dwm.exe in Task Manager) consuming large amounts of CPU and RAM resources. After a bit of snooping around, I found a simple fix:

1.) Click the START button.
2.) Type “powershell” into the “Search programs and files” box.
2a.) If you see a menu item for PowerShell, open it.
2b.) If you do not see a menu item for PowerShell, this won’t work for you.
3.) Type “net stop uxsms”
3a.) Try this if you want a stripped-down version of your ALT+TAB and fewer bits of eye candy. It’s just like WinXP, and runs quicker. If your ALT+TAB was slow, it should now zip along quite nicely.
3b.) If you want your effects and nicer ALT+TAB screens back, type “net start uxsms” and you should be good to go.