Rosetta Stone v3.4.7 Preinstalled.exe

Steps -
1.Install this main application. Allow it to extract to its default location i.e. C:. Don't run the application yet.
2.Download the "preinstalled" language pack of your choice (check my other uploads). Install it to its default location.
3.Now go to C:Program Files (x86)Rosetta StoneRosetta Stone V3 and run RosettaStoneVersion3.exe
4.Activation screen comes up. Select "Never Register"
5.Now you'll see that all the language packs have already been activated. (That's why the name "Pre-installed"). Click on continue
5.Create user. Select "save changes"
6.Select the course. (mostly will select "full year ....")
7.Click on start.
8.Choose language (only the ones which have been installed). Then select level. Continue
9. Done

Credit goes to EinDeutschMan

Error 2123
To bypass this error, don't let your antivirus reach/touch the Rosetta directory. Add the directory to the exclusion list.
Deleting tracking.dB3 can be a solution for some but note that after you delete tracking.dB3 your progress is lost.

Error 2125
In case of this error, follow this-