Open the Internet browser and in the address bar type 192.168.1.1. On the status page and here you will find the current firmware version.Go to Linksys website and check for the firmware update for your model.Linksys says it will soon release firmware updates for all affected products, including models no longer sold.If you're using an older Linksys E-series router and have trouble finding a firmware upgrade, you may have to wait a few weeks. In the search box under "Start Here," type the model number of your router.There are a few extra steps you should take to make sure your router is as secure as possible. In the router's Web-based setup page, click on the "Administration" tab at the top.You should now see a tab at the left labeled "Remote Management Access." To its right are the words "Remote Management" followed by an "Enabled" or "Disabled" option.You should be able to find this number written on your router near the model number. Locate the download named "Firmware" and click "Download." The download file should have a ".bin" extension, though it might also come as ".bix," ".trx," ".fim," ".rmt" or "" Save this file anywhere on your computer. A popup will eventually appear informing you that the upgrade has been successful. Do this by unplugging it from its power socket for 10 seconds, then plugging it in again.Click "Continue" on that popup to complete the process. Congratulations &mash; you're now running the latest firmware for your router.
At the end you will get the message ” upgrade successful”.
If you haven't, then leave the "User name" box blank, and in the "Password" box, enter "admin." If that doesn't work, type "admin" into the "User name" box as well. Check that your router is running the latest firmware.
In the upper-right-hand corner of the screen, you should see the words "Firmware Version" and then several numbers. If that's the number you see, then skip to step 12.
If the wireless network connection is slow or intermittent then you can try changing advanced wireless settings or wireless channel on the router.
However if the problem continues then I will suggest you to upgrade the firmware.