The ydbypc.dll file is a PC protection module of Yahoo. Online Protection from Yahoo! Inc. Yahoo! Online Protection is a package of security programs provided free of charge to customers of an Internet service provider. The YOP suite is a group of security software that has been repackaged and linked to a control panel by Yahoo! The versions of software may be different depending on what ISP you are subscribed through. If there is an error with this file, your computer may be vulnerable to Internet attacks. Clean your Windows registry to solve the problems.
The registry database works as an information booth for Windows. It stores information about all the programs installed on your system so Windows is able to run them. If you have a registry error that stops your programs, run ZookaWare PC Cleaner to fix it. ZookaWare PC Cleaner cleans up every problem in your registry to get your system working at 100% again. Try a free ZookaWare PC Cleaner scan to find out how dirty your registry is.