How can I remove this 7znuvj.dll

if you are familiar with virus/trojan, you can remove it manually. YOu need clear registry, delete source file. Also you can kill this virus/trojan use some anti-virus software.

http://forums.techguy.org/malware-removal-hijackthis-logs/769094-how-remove-7znuvj-dll-uj56px.html