If you believed the vendors, you’d think Wi-Fi was simple: Turn on your computer or other device, hop on the Internet and you’re set to go.
But as we all know, life isn’t quite that easy. Your home or office network can have dead spots where devices can’t seem to connect, or where the connections get slow or flaky. Public hotspots can make you prey for hackers and snoopers. And when you are at a hotspot, you might need to share your connection with your other devices, including smartphones and tablets.
While there is no way to immediately solve all the problems associated with wireless connectivity, there are applications that can make things better—and many of them are free. I’ve rounded up nine free pieces of Windows software that can go a long way toward helping you solve your Wi-Fi issues at home, in your office or on the go.
Home and office networks
If you want to get serious about troubleshooting your Wi-Fi network, HeatMapper may well be your best bet.
To get the most out of HeatMapper, you’ll have to do a bit of work, so be prepared to put in some time. Run the program and then walk around the area your network covers (while carrying your laptop). HeatMapper creates a heat map showing you the strength of Wi-Fi coverage.
You can then reposition computers away from areas of low coverage and place them where coverage is better, or plan to use your smartphones and tablets in high-bandwidth areas. HeatMapper is also useful if you’re just starting to build your network, because you can try positioning your router in various locations and see which offers the best all-around coverage.
It does more as well. If you have a wireless network with more than one access point, it locates each for you. It also detects the security settings on all access points.
HeatMapper is the free version of a more powerful Wi-Fi surveying tool called Ekahau Site Survey. HeatMapper lets you do surveys for only 15 minutes at a time; Site Survey gives you unlimited time, along with additional features. Pricing varies according to the size and complexity of your network.
(Note: While the product description page says it works only with Windows 7 and Windows 8, I’ve used it on several Windows 10 machines with no problem.)
If you don’t want to go through the hassle of creating a heat map of your network, and would prefer something simpler and more straightforward to use, you should give Acrylic WiFi a try. It locates every network within range of your laptop and displays a tremendous amount of information about each: the network name (SSID), MAC address, channel it uses, type of encryption, manufacturer, type of 802.11 (b, g and/or n), maximum router speed, manufacturer and more.
One especially useful feature is the signal strength display for each network, which includes an RSSI (Received Signal Strength Indicator). It also shows a moving graph of the strength of each network over time. So if you want to find dead spots, strong spots and so on, you only need to walk around with your laptop and look at the signal strength as you move.
I found it a tremendous help with my home network. I tested signal strength throughout my house by running Acrylic WiFi Home, and found that moving the router only a few feet made a surprisingly significant difference in signal strength for various locations. I can now finally stream Netflix, Amazon Prime Video and Hulu to my living room TV without the glitches and delays that have plagued me.
If you try Acrylic WiFi Home, I suggest running it in Advanced Mode (get there by clicking the settings icon in the upper right of the screen and selecting Advanced Mode). This lets you see what channel your network uses to broadcast on and which nearby networks may also be broadcasting on that channel (and the strengths of those networks). As a result, you’ll be able to find out whether there’s any interference from other networks, and then configure your network to use a different channel if needed.
If you want something even simpler than Acrylic, give Homedale a try. It’s a stripped-down Wi-Fi analyzer that runs as an executable—no need for installation. It finds all nearby Wi-Fi networks and shows their SSIDs, MAC addresses, signal strength and encryption type.
Make sure to click the Update button at the bottom right of the screen or it might not show anything. Also, try the Frequency Usage tab, which shows you all the networks grouped according to the channel they use, and their relative strengths. That way, you’ll be able to see whether your network has too much interference from nearby networks.
As you no doubt know, every device that connects to the Internet has its own specific MAC address (such as 00-0C-29-C4-FD-C3). One way to keep your network safe is to use MAC address filtering—in other words, configure your router to ban all devices from your network except those with a specific MAC address.
Technitium MAC Address Changer is a great way to check whether the security is working. It lets you change your computer’s MAC address to one that you haven’t configured as allowed on your network. Once you do that, you can check whether your router blocks it. Technitium makes it easy to then reset the MAC address to its original setting.
Products such as Acrylic WiFi Home report on your wireless network’s signal strength, but if you want to know about real-world throughput, download the TamoSoft Throughput Test. It sends TCP and UDP data between two Windows computers on the network and measures throughput in both directions between them, as well as packet-loss and round-trip time.
Setup can be a bit confusing. The application installs both a client and a server on each machine. You have to first decide which machine you want to be the server and run the server installation on that. The server will show the IP address and port number to which the clients can connect.
Next, install the client on the other machine or machines on the same network, type in the IP address and port of the server, and click Connect. The computer you’ve designated as the server will continuously monitor their throughput, packet loss and round-trip time, displaying the information as a moving graph.
As with Acrylic WiFi, TamoSoft’s application is especially useful for locating routers or other devices and finding dead spots in a house or office space—I found instances when I took a single step and the throughput dropped drastically.
There’s also a Mac version available, so you can test throughput between Windows and Mac computers as well.
If you’re looking for the simplest and most basic test of your Wi-Fi speed, then Ookla Speedtest is the way to go. You don’t need to download any software (which means this particular app works just fine for Macs as well). Just head to the site, click “Begin Test” and the site tests your upload and download speeds. It’s a great tool for getting quick-and-dirty information about your network’s throughput.
It’s also useful for finding out whether a slowdown is being caused by your wireless router or your Internet provider. Unplug your wireless router, connect a computer to the modem with an ethernet cable, run this test and check the results. Next, plug your router back into the modem and do the same test using a wireless device. If you see that your ethernet connectivity is normal, but your wireless bandwidth is extremely low, the slowdown is likely being caused by your router.
Next page: Wi-Fi tools for traveling outside your home/office