How do I know if I'm being attacked

[Sirtokalott]

I use Live Messenger and a file sent to me was blocked. I have a wireless
adapter and connect to my neighbours router (yes she gave me the access code)
and I ussualy have a wireless connection logo in the system tray. When I
started up the pc the other night I had an extra icon showing a cable
connection to another computer. I also now have a modem installed in device
manager. I think it is my neighbours computer which I am connecting to but
aint to sure as neither of us is experts. The pc is also running much slower
now. I'd love to know of anyway of identifying a deliberate attack from
someone. Here's what the modem log says.

04-06-2008 21:59:19.375 - File: C:\WINDOWS\system32\tapisrv.dll, Version
5.1.2600
04-06-2008 21:59:19.375 - File: C:\WINDOWS\system32\unimdm.tsp, Version
5.1.2600
04-06-2008 21:59:19.375 - File: C:\WINDOWS\system32\unimdmat.dll, Version
5.1.2600
04-06-2008 21:59:19.375 - File: C:\WINDOWS\system32\uniplat.dll, Version
5.1.2600
04-06-2008 21:59:19.421 - File: C:\WINDOWS\system32\drivers\modem.sys,
Version 5.1.2600
04-06-2008 21:59:19.421 - File: C:\WINDOWS\system32\modemui.dll, Version
5.1.2600
04-06-2008 21:59:19.421 - File: C:\WINDOWS\system32\mdminst.dll, Version
5.1.2600
04-06-2008 21:59:19.421 - Modem type: Communications cable between two
computers
04-06-2008 21:59:19.421 - Modem inf path: mdmhayes.inf
04-06-2008 21:59:19.421 - Modem inf section: M2700
04-06-2008 21:59:19.421 - Matching hardware ID: pnpc031
04-06-2008 21:59:19.453 - 19200,8,N,1, ctsfl=1, rtsctl=2
04-06-2008 21:59:19.453 - Initializing modem.
04-06-2008 21:59:19.453 - Waiting for a call.
04-06-2008 21:59:19.484 - 19200,8,N,1, ctsfl=1, rtsctl=2
04-06-2008 21:59:19.484 - Initializing modem.
04-06-2008 21:59:19.484 - Dialing.
04-06-2008 21:59:19.500 - Send: CLIENT
04-06-2008 21:59:21.500 - Timed out waiting for response from modem
04-06-2008 21:59:21.500 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
04-06-2008 21:59:21.515 - Send: CLIENT
04-06-2008 21:59:23.515 - Timed out waiting for response from modem
04-06-2008 21:59:23.515 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
04-06-2008 21:59:23.531 - Send: CLIENT
04-06-2008 21:59:25.531 - Timed out waiting for response from modem
04-06-2008 21:59:25.531 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
04-06-2008 21:59:25.546 - Send: CLIENT
04-06-2008 21:59:27.546 - Timed out waiting for response from modem
04-06-2008 21:59:27.546 - Failed to send command because of WriteFile()
Failure, Error=000003e3.
04-06-2008 21:59:27.546 - Hanging up the modem.
04-06-2008 21:59:27.546 - Hardware hangup by lowering DTR.
04-06-2008 21:59:29.546 - A timeout has expired waiting to comm event to
occour.
04-06-2008 21:59:29.546 - 19200,8,N,1, ctsfl=1, rtsctl=2
04-06-2008 21:59:29.546 - Initializing modem.
04-06-2008 21:59:29.546 - Waiting for a call.
04-06-2008 21:59:29.546 - Session Statistics:
04-06-2008 21:59:29.546 - Reads : 0 bytes
04-06-2008 21:59:29.546 - Writes: 0 bytes