If you think that this file contains a virus or another malware, please download a virus scanner.
If MSI9B12.tmp is using too much CPU or too much memory in your system, it is possible that your file has been infected with a virus. Try to install an antivirus to see if it helps.
If you want to remove MSI9B12.tmp from your computer, just go to Start > Control Panel > Add/Remove programs and select Yandex from the list.
You may try contacting Yandex LLC, the developer of MSI9B12.tmp and ask for more information.