DeltaClick DeltaBar is a spyware program disguised as a browser helper object, specifically, a toolbar.  A toolbar is an added area on your browser frame that contains buttons with direct links to various websites.  In this case, they all link to DeltaClick DeltaBar’s affiliate sites.  It was first discovered on February 1 in 2004.  It is released by a company called DeltaClick.
DeltaClick DeltaBar’s primary mode of attack is that it monitors your browsing habits to generate pop-under ads.  It does this by collecting URL information from your browser’s Temporary Internet Files folder.  It then uploads this information to a remote server.  The data is then processed and ads based on this data are sent to your computer in the form of pop-under ads.
DeltaClick DeltaBar offers no real benefit to the user, but it offers plenty of irritation.  It also significantly slows down your computer’s performance, and may cause your applications to crash.  It is recommended that you remove DeltaClick DeltaBar as soon as you’re infected.
It has been said that DeltaClick DeltaBar can be removed by the Add/Remove Programs function in Windows.  This is true for the toolbar part of the program, but may not be true for the spyware.  You may still get pop-under ads after removing the program this way.  You should use the best spyware removal tool to get rid of this infection.  SpyZooka is the best tool out there for this.

Also Known As:
DeltaBar, Adware. DeltaBar-DeltaClick,
DeltaBar.DeltaClick, DeltaClick, DeltaBar DeltaClick

Associated Files:
winapi.exe, Dclogic.dll, Deltaclick.dll, Deltaclickres.dll,
HKEY_CLASSES_ROOT\clsid\ {0fc817c2-3b45-11d4-8340-0050da825906}
HKEY_CLASSES_ROOT\software\microsoft\windows\currentversion\explorer\browser helper objects\ {0fc817c2-3b45-11d4-8340-0050da825906}
HKEY_LOCAL_MACHINE\software\classes\clsid\ {0fc817c2-3b45-11d4-8340-0050da825906}
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\explorer\browser helper objects\ {0fc817c2-3b45-11d4-8340-0050da825906} HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\runservices, winapi=winapi.exe