Question: wi-fi is available in public areas and is free of charge
Answer: --> Wi-fi is available in public areas and is free of charge

Question: yes, ideal is totally secure.
Answer: --> Yes, iDeal is totally secure.

Question: uninstallation: as dll files are created to support other programs and softwares working well, the data and functions are actually shared by many programs. when you uninstall a program, imkrcac.dll may be mistakenly deleted.
Answer:
--> Uninstallation: As DLL files are created to support other programs and softwares working well, the data and functions are actually shared by many programs. when you uninstall a program, imkrcac.dll may be mistakenly deleted.