Note that many websites have their own advertising, unrelated to adware.
BookedSpace is an Internet Explorer Browser Helper Object used to show advertising.
BookedSpace/Remanent: early variant (around July 2003) with filename rem00001.dll, controlling server 188.8.131.52.
BookedSpace/BS2 and BookedSpace/BS3: newer revisions (August 2003) with filename bs2.dll or bs3.dll, controlling server www.bookedspace.com.
BookedSpace/Remanent is silently installed by MThree MP3 to WAV converter. BookedSpace/BS2 is silently installed by FreeWire's FreeMP3Player. The origin of BookedSpace/BS3 is currently unknown.
BookedSpace can contact its controlling server when a new page is visited, which may direct it to open pop-up ads. When the controlling server is contacted, the URL of the current page is passed along with a user ID for tracking purposes.
Open a DOS command prompt windows (from Start->Programs->Accessories), and enter the following commands, for the Remanent variant:
regsvr32 /u "..\rem00001.dll"
Or, for the BS2 variant:
regsvr32 /u "..\bs2.dll"
Or, for the BS3 variant: