lansweeper found an unauthorized IE BHO on a computer. So, I scanned that computer, I found a trojan 🙂 and I removed it. But now, how could I remove this "unauthorized IE BHO" from lansweeper. Because even when I do a full scan of that computer, lansweeper still found it.
Did the "Last seen" date of the affected machine actually change, confirming the completion of the scan? Are you certain this BHO is removed? You should not assume all entries found under "IE: unauthorized IE BHOs" are malicious by the way. You can add to the list of authorized IE objects under Configuration\Allowed Active-X.
Make sure you perform a "Full Rescan" of the affected machine, as shown in the attached image. The "Rescan" option respects item wait times, "Full Rescan" does not.