This message was posted on behalf of Intel Corporation
Please keep in mind that the Intel® WiFi Link 5300 (AGN) has been discontinued and is no longer supported. We can provide some suggestions as an extra mile, but cannot guarantee a resolution.
- Customer Support Options for Discontinued Intel® Wireless Products.
Looking at your router, it seems to be an 802.11g model (a 2002 legacy standard). Your wireless adapter on the other hand is 802.11a/g/n certified.
While wireless standards are backward compatible, wireless routers don't usually take kindly to this, and often have issues when newer products try to connect. This seems to be your current issue.
There are two ways to address this, we can suggest trying both if possible.
1. Check to see if there is a firmware update available for your router.
2. Limit your wireless adapter to the older standard. You can access the wireless mode settings on your adapter through the Device Manager: Advanced Intel® Wireless Adapter Settings.