The repair installation may work. Deleting the DLL may also work -- or it may not. In addition, you may end up with an error every time you start running your computer.
Some really bad malware programs will not let you delete the file, or if you delete it, the malware will replace it immediately. Try to delete it. If it doesn't work, boot into safe mode and try to delete it from there.
After deleting the DLL as seahwk83 suggested, you need to clear references to the DLL from the Registry. Some people are terrified of the registry, and with good reason. I suggest the following.
Download a copy of CCleaner (it's free):
CCleaner - Home
Click on the "Registry" icon in CCleaner and click the "Scan for issues button". Choose all of the issues and Click "Fix Selected Issues". It should prompt you to save a backup (that can never hurt), so do so and fix everything it found. Repeat until no more issues show up. Usually, you'll have to scan at least twice; sometimes three times.
You can also run Hijackthis.exe
Trend Micro HijackThis - Free software downloads - CNET Download.com
And post the result file. Usually an expert can tell you what to eliminate.