dwm.exe is a Desktop Window Manager from Microsoft Corporation belonging to the Operating System. dwm.exe is the Desktop Window Manager and is responsible for the graphical effects in Microsoft Windows Vista operating system such as 3D effects, live windows previews and windows transperancies. The Aero interface in Windows Vista can be quite taxing on system performace on certain computers and you can switch it off or reduce the screen resolution to increase performance.
How much RAM do you have? This problem might arise if you do not have enough RAM to run Aero properly. You need at least 1GB and 2GB is better.
eNMTray.exe is a process from eNet by Acer and part of Empowering Technology. I have read that you can disable it but I can`t find out exactly what it does. It might control the LAN/WLAN connections. It appears to cause problems for some people and they disable it. Can you find this out? Don`t disable it until you know exactly what it does
Suggestions. Try one at a time and test to see result.
1. If you are short of RAM, try turning Aero off
2. Try to find out what eNMTray.exe is. If it is not really needed to be running turn it off in msconfig. While you are in msconfig disable
everything not neede to be running at stertup
1. Click on the Vista start icon in the bottom left corner of your screen.
2. Type MSCONFIG in the search box and then either press enter on your keyboard or double-click on the MSCONFIG program that appears in the search results.
3. Vista will ask you for permission to continue. You may see a box asking you to key in your computer's administrator user name and password.
Or, if you're already logged into Vista as an administrator, you may see a box asking you if you would like to continue.
Either way, follow the on-screen prompts to give Vista permission to continue.
4. Microsoft's System Configuration Utility will launch.
Click on the Startup tab.
Keep the page open then go to one of the links below.
http://www.sysinfo.org/startuplist.php
http://www.castlecops.com/StartupList.html
Read the Key at top of page. Use the Search box to check all your entries.
It will tell you what all the entries are and whether you can disable them or not. It will also identify any malware. Disable everything which is not needed to run at start up
When you reboot you will get a message saying you have started in "Selective Startup" Click "Don`t show this message again" then OK
Post back when you have tried these
