dsr.dll is an adware program Adware.ZQuest. dsr.dll displays advertisements. Related files: lofqf.exe SSK3_B5.exe dsr.dll %Windir%\TopContext.exe Adds the value: "Windows More Choice" = "%Windir%\TopContext.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Remove dsr.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.