It was probably bundled with some other product you downloaded...
The logo Microsoft partner doesn't tell anything about the quality of a product... Just about anyone can become a Microsoft partner...
I suggest to try to uninstall the PCleaner with free Revo Uninstaller: http://www.revouninstaller.com/revo_uninstaller_free_download.html
or with also free AppRemover:
In case the above tools don't work, try scanning with the tools mentionend in this free, multi-step removal guide: http://malwaretips.com/blogs/remove-adware-popup-ads/
In case you can't do step 1, move on with the next steps.
If need be, run multiple scans with each of the tools and also reboot after each scan.
Note: scanning with Hitman Pro might not be necessary.
Cheers,
J