I went ahead and tried this...

I just downloading this title here from download.com:

http://download.cnet.com/Magix-PC-Check-Tuning-2012/3001-18512_4-10969795.html?spi=bf559a6fe0062f12d9ea14d84afc1ad7&dlm=0

Using IE9 with Smartscreen filter "ON"

The only pop up I got was "Do you want run or save pc_check_tuning_2012_81mb_us.exe (80.3MB) from software-files-a.cnet.com"

I clicked "Save" and IE did it's security checked and it passed and I saved the file and was able execute the file and ran the software with no flags.

Are you using IE9 or 8?