Well, I have removed it. After sending a nice legal threat to the people at Zetta-Search.com, they seemed more than happy to tell me how to get rid of it.
Their reply was:
Hello.
Please, don't worry, I'll help you to uninstall this thing.
First of all, take a look at list of programs in Add/Remove list.
Open it thru Start->Settings->Control panel->Add/remove programms
If you'll see there names like:
MDS Search Booster
Quick Search Toolbar
Polaris Solutions
- uninstall it.
If there will no programs with names like these - download this
remover:
http://zetta-search.com/uninstall/uninstall.exe and run it.
And finally if it will not help - search these files on your hard
disk:
dsmanager.dll
flashplayertb.dll
flashplayerbh.dll
and if any of these files exists on your disk - delete it.
Yours, Alex.