Dll issues after deploying application Equitrac Express Client 4.2.1

Question

We have deployed .msi application using command following
cmd /c xcopy "Equitrac Express Client.msi" "c:\" /E /C /R /H /K /Y&msiexec.exe /i "c:\Equitrac Express Client.msi" EQCASNAME="EQUITRAC-CAS" EQLANGUAGE="en" ADDLOCAL="Common,DRC,DesktopPrinting,WindowsPrinting"
/q
application deployed fine but missing dll's  which breaks some of application functions
Eqdtpsp.dll,
EQPortMonitorHook.dll,
EQPortMonitorSpy.dll
couldn't find any errors in - AppDiscovery.Log, AppIntenteval.Log,AppEnforce.Log 
Need help...

Answer 1

Why on earth do you copy the .msi file to the root of C: -drive?!
You can simply use the application model and when creating the deployment type by just inserting the correct installation command which appears in this case to be
msiexec /i "Equitrac Express Client.msi" EQCASNAME="EQUITRAC-CAS" EQLANGUAGE="en" ADDLOCAL="Common,DRC,DesktopPrinting,WindowsPrinting" /qn
As long as the "Equitrac Express Client.msi" is copied to your content source and that source is accessible by the ConfigMgr through unc path (like \\server\source\Equitrac Express) you should be just fine. ConfigMgr client will copy the .msi package
to %windir%\ccmcache\xx\ and it will be run from there (with the command you provided in the deployment type). There's absolutely no need to do any copying to anywhere.
What goes for the missing .dlls, have you tried running the installation command (what I described above) with system account (using psexec -s cmd) before implementing it to ConfigMgr and checked that everything works fine?