Server console handler/ERROR

I'm running a .exe server. It's only for my kid and 3 friends. Started a month ago and it has worked fine. Today I can't connect to the server and I get this report in my log (I have checked some of the other questions but I did not find a solution):

[10:56:05] [Server thread/INFO]: Starting minecraft server version 1.7.4
[10:56:05] [Server thread/INFO]: Loading properties
[10:56:05] [Server console handler/ERROR]: Exception handling console input
java.io.IOException: The handle is invalid
at java.io.FileInputStream.readBytes(Native Method) ~[?:1.7.0_45]
at java.io.FileInputStream.read(Unknown Source) ~[?:1.7.0_45]
at java.io.BufferedInputStream.read1(Unknown Source) ~[?:1.7.0_45]
at java.io.BufferedInputStream.read(Unknown Source) ~[?:1.7.0_45]
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source) ~[?:1.7.0_45]
at sun.nio.cs.StreamDecoder.implRead(Unknown Source) ~[?:1.7.0_45]
at sun.nio.cs.StreamDecoder.read(Unknown Source) ~[?:1.7.0_45]
at java.io.InputStreamReader.read(Unknown Source) ~[?:1.7.0_45]
at java.io.BufferedReader.fill(Unknown Source) ~[?:1.7.0_45]
at java.io.BufferedReader.readLine(Unknown Source) ~[?:1.7.0_45]
at java.io.BufferedReader.readLine(Unknown Source) ~[?:1.7.0_45]
at lo.run(SourceFile:78) [minecraft_server.1.7.4.exe:?]
[10:56:05] [Server thread/INFO]: Default game type: SURVIVAL
[10:56:05] [Server thread/INFO]: Generating keypair
[10:56:05] [Server thread/INFO]: Starting Minecraft server on *:25565
[10:56:06] [Server thread/INFO]: Preparing level "world"
[10:56:06] [Server thread/INFO]: Preparing start region for level 0
[10:56:07] [Server thread/INFO]: Done (0,970s)! For help, type "help" or "?"