This file has been reported to be part of a spyware/malware/trojan. It is likely that the problem you are experiencing is linked directly to the spyware/malware/trojan rather than an actual missing DLL-file and the recommended course of action is to first locate/remove the Malware. We do not recommend downloading this file.
DLL-Files.com Support says:
E6F1873B.DLL is part of an AdWare called BrowserAid.
This is a possible manual solution for you 'handyman-fixers' out there:
WARNING: Do this at your own risk. manually changing the registry could cause system critical errors if done incorrectly, the instructions below are not guaranteed to work on your particular system setup.
These instructions, will help you to get rid of any startup errors about E6F1873B.DLL.
DLL-files.com strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files.
Instructions:
1. Click start, choose 'run'
2. Type 'regedit'
3. Navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
4. From the right panel, if they exists, delete the values:
"{12EE7A5E-0674-42f9-A76B-000000004D00}" = "rundll32.exe stlb2.dll,DllRunMain"
"A70F6A1D-0195-42A2-934C-D8AC0F7C08EB" = "rundll32.exe E6F1873B.DLL, D9EBC318C"
"Rundll32_7" = "rundll32.exe C:\WINDOWS\System32\msiefr40.dll,DllRunServer"
"Rundll32_8" = "rundll32.exe C:\1.dll,DllRunServer"
5. Exit the registry editor
6. Reboot your computer