If you are using a public computer, then you must make adjustments because of that.
The easiest way is to use a thumb drive for BitComet. Download one of the “green” or not-installed versions of bitcomet. Unzip it onto the thumb drive, which I will assume is drive N: in a top-level directory which I will assume is N:\BitComet
Invoke BitComet by navigating to N:\BitComet and double-clicking BitComet.exe.
In your advanced options, set “system.use_app_data” to “false”. This step will assure that BitComet writes its options file onto the program directory (which is the thumb drive). The options file will be called “Bitcomet.xml”. Edit the remainder of the options as you want them, then save them.
Exit BitComet. Use a text editor like notepad to open the bitcomet.xml file on the thumb drive. You should be able to inspect it to assure it contains the settings you want. Don’t try to edit it or save it, just look at it. You’re verifying that the file is present, is where you think it is and contains what it should contain.
If the public computers you use are all the same (or you always use the same one) and have the same connection, then you can configure BitComet “generically” for all of them. It’s the connection speed that’s critical here. Individual differences in the computers don’t matter so much. TEST the bandwidth. Set BitComet’s global maximum upload speed to 80% of the tested value. If the connections vary a LITTLE, then use the slowest value. If they vary a lot, you’ll have to adjust the speed for each machine, but that only takes a moment. Then you should be able to browse or chat while BitComet is running.
Now you should be able to just plug in the thumb drive to whatever computer, and run BitComet off of the thumb drive.
If, for some reason, you can’t do this, then configure BitComet on a machine, then find and copy the bitcomet.xml file to a thumb drive. Now you can just copy that file from the thumb drive to the correct location on the computer’s hard disk and your preferences will be restored.
The built-in browser is based on MSIE 5, so I don’t recommend that you use it at all. There’s no reason to, and many people don’t. That’s probably why updating it has been such a low priority. You can find it in the “Favorites” window, but I disable that window completely. There’s nothing in it that I ever use.