dwm.exe is a program which is probably NOT a virus. So, if dwm.exe is on your laptop or desktop computer, it is probably ok, and will NOT be a cause for concern. Even if your system is virus-free, it is still recommended to run a good antivirus with a good track record, in order to yourself your PC against viruses and malware.
This application is normally stored in C:\WINDOWS\system32\dwm.exe.
The MD5 checksum for this file is 2b6d7a9caeda499838e09e8a0678c90d.
This program does NOT operate as a Windows service. This is usually a good sign.
dwm.exe seems to use the functions of Windows SFC (System File Checker) or Windows File Protection.
This is a 64-bit executable. It runs using the full capacity of modern CPUs.
dwm.exe appears to have visible windows. This means it doesn't run in a kind of invisible mode. Its operation is clearly displayed to the user.
dwm.exe has a digital signature. Today most virus-free programs are digitally signed.
The digital signature attached to dwm.exe verifies as ok. This is very good.
Digitally signed by: Microsoft Windows
Certificate's issuer name: Microsoft Windows Production PCA 2011
This program does NOT have an uninstall command stored in registry.