I/O Conflict

Have you installed a Modem into the Computer. What you have there is a conflict with your COM Ports. 2F8 and 3F8 are Com1 and Com2 respectivly. If you are not using Com1 go into the BIOS and in Peripheral Settings there should be something that willmention about the COM ports. If you are not using the COM1 port, then you can Disable the one that points to 2F8 (Unless it says auto - which it might be the COM1 port).

This should sort out the problem

Cheers ....

Do Start / Settings / Control Panel / System / Device Manager / Computer /
Properties. Select input/output and find the device using 2F8 - it will
probably be a COM port. Then look at Properties / Resources for other
devices, starting with Ports (COM and LPT), until you find the other device
that is using I/O port 2F8. One of these two devices will be the COM port
the modem is connected to. You will have to remove or alter the other
device.

For instance, if you have a plug-in modemcard it might be identified as
COM3 or COM4 but assigned I/O port 2F8. This port is usually assigned to
COM2, which is probably on your motherboard. In this case, you would go into
BIOS setup and either disable COM2 (if you don't need the extra serial port)
or select a different I/O address for it. Windows should pick up the change,
but you might have to delete the device (if you disabled it in BIOS) or
delete and re-add it (if you changed its configuration). The exact details
will change according to your hardware configuration.

If you are not going to install a MODEM, the quick and dirty way to get rid of the problem ,is to disable the Second Serial Port in the BIOS. (the second Serial Port is
COM 2 using IRQ 3 , and I/O address 02F8)
The more elegant solution tis to gointo device manager and put the sound card into manual configuration and force it to NOT use IRQ3 or I/O address 02F8.
Regards, Chris

This is a conflict between your Sound Blaster card and one of your comunications ports (Com2), the easiest way is go to the BIOS setup and change your communications port address, If your Mainboard is not too old you should be able to make it AUTo so it will choose a free address, or you can change the address manual to a non-used address or just disable this Com port, you probably won't use it.
Good luck,
@lberto