Azureus Bitorrent Plugin ?
Could be a virus, best way is to run the following scanners ..
http://download.bleepingcomputer.com/sUBs/dds.scr
Disable any script blocking protection
Double click dds.scr to run the tool.
When done, DDS.txt will open.
Save both reports to your desktop.
http://www.majorgeeks.com/download.php?det=5198
Extract the contents of the zipped file to desktop.
Right-click and choose Run as Administrator on GMER.exe. If asked to allow gmer.sys driver to load, please consent .
If it gives you a warning about rootkit activity and asks if you want to run scan...click on NO
In the right panel, you will see several boxes that may have been checked. Uncheck the following ...
IAT/EAT
Drives/Partition other than Systemdrive (typically C:\)
Show All (don't miss this one - make sure it is UNCHECKED)
Then click the Scan button & wait for it to finish.
Once done click on the [Save..] button, and in the File name area, type in "Gmer.txt" and save it where you can easily find it, such as your desktop, and paste it in your reply.
If anything shows up make a posting over at bleeping computers for further help.