The file ydbspamguard.dll is a spamguard module for Yahoo! Online Protection from Yahoo! Inc. Yahoo! Online Protection is a suite of software provided by your Internet service provider to protect your computer from online threats. The suite is a set of security programs repackaged by Yahoo! and linked by a control panel. The programs on your system may be different from other versions depending on what ISP you use and which version of the software you are on.
Regardless of the package, a problem with this file may indicate broken security software, which could mean your computer if vulnerable to attack. You should clean your registry to fix the issue.
Every Windows computer has a database at its heart called the registry, which stores the vital information about everything installed on the computer. Errors in the registry break your software. When that happens, run ZookaWare PC Cleaner to get your registry clean again. ZookaWare PC Cleaner is guaranteed to find every problem in your registry and fix it. So try a free ZookaWare PC Cleaner scan now that will show you what problems your registry has.