Check your process list
You may want to check out is there process called DMW.exe running on your computer. I mean DMW.exe not DWM.exe. DWM.exe is malware:
dmw.exe (847.87K) - Detected 5 Times.
I had exactly this same issue after installing clean install and couldn't figure it out at first. After detecting this process running on my comp I found out how to get rid of it and same time my problem with FullScreen playback issues was gone.
Here is some instructions how to get rid of it if you find that process running on your computer.
1. Download Autoruns for Windows:
Autoruns for Windows
No installation required.
Simply unzip Autoruns.zip file, and double click on autoruns.exe file to run the program.
2. Run Autoruns, click on "Logon" tab and UN-check:
+ "TaskMngr"
3. Restart computer, rerun Autoruns, click on "Logon" tab, right click on the above entry (+ "TaskMngr") and click "Delete".
4. Open Windows Explorer and delete following folder:
C:\Program Files (x86)\Common Files\Lenovo
5. Restart computer and check your process list.
Here is original page where I got help:
Think DMW.exe is a backdoor of some type, help needed.. - Page 2 - Am I infected? What do I do?
