fios should be faster than any provider out there, so your hardwired connections should be super fast. your wireless might be a different story and a different fix, so are you noticing that fios is slow and your connections are wireless, or does it not matter if you are hardwired or wireless?
if your hardwired and seeing a slow in connection then optimizing would be a great idea for you plus a couple other suggestions.
So to optimize your PC - look on your desktop for this icon.
the installers should have installed it on your PC.
Once you have it open head over to the internet option (usually a picture of a laptop) and then click on quick fixes (if I remember right) and then optimize PC. you may even see that optimize option when you first open up the program.
If that doesn't fix a hardwired problem, then try a couple of the following steps to see if it reacts faster.

- Try a 2nd Browser like Google Chrome or Firefox (possible browser issue can be identified by testing in a 2nd browser)
- Test it from a 2nd machine like a laptop, friends or work computer
If it's Wireless, then You can resolve many wireless issues by simply changing the channel in the Verizon FiOS router.
user name is admin. and the password is most likely the serial number found on the service tag of your VZ router unless you changed it.
Once you login succesfully, go to the top and hit wireless, then on the left basic security. then go to option 3 which is channel
Channels 1, 6 and 11 and are the only channels you should try.
So it will likely be set to auto, change it to 11 and put the check for keep settings even after reboot (Directly under the channel) and then hit apply., after you hit apply, test your connection out, if you notice a difference, leave it like that until the problem happens again, and if it happens again, go back into the router, and try channel 6, test it out. and then finally 1 if the first two don't work.
Also visit
Actiontec's web page where they provide easy tips on how to improve
wireless networking with the MI424WR Verizon FiOS Router.
NOTE: Your actiontec router gets its internet connection from the COAX cable. That means that you can move the actiontec to any room that has a working TV outlet connected to the FiOS system. You may need to purchase a 2 way TV splitter (you may have one in the house that you can re-use) to connect it. The cable coming from the wall would connect to the splitter, one side of the splitter will go to your Cable Box where it is labled FIOS TV IN or RF IN and then the other side of the splitter will connect to the WAN Coax on the router.
Additional Links and Recommendations
1. Optimize Internet Explorer
2. Intermittent Wireless
3. Slow Connection