Can't connect to modem wirelessly

Lately my modem has been acting weird. From time to time every device in the house can't connect to it and whenever I try to connect manually from my laptop it says that 'windows was unabe to connect'. I'm sure it has nothing to do with the signal since even if I'm standing next to it I can't connect. I have tried resetting it twice, the first time I was able to connect afterwards and everything was ok for about two weeks or so, but today it happened again and after resetting I was still not able to connect. Can anyone help me?
 
Make/Model of your WiFi router? Have you ever updated the firmware for it?
 
I would have given specifics of the update, but don't read Greek, so I'll outline the process and you will need to
follow the vender's instructions.

1) google for Sagem F@st 2444

2) find the vender's site (not some other site that looks promising)

3) look for the link that has DOWNLOADS or SUPPORT and find the UPDATE section

4) make sure you match your model number precisely and download the latest firmware

5) print out the instructions for How to install and follow it exactly

6) you will need the userid/password for the router and that should be on the vendor's site too.

 
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