iStat Menus is not available for Windows but there are plenty of alternatives that runs on Windows with similar functionality. The best Windows alternative. iStat Menus can notify you of an incredibly wide range of events, based on CPU, GPU, memory, disks, network, sensors, battery, power and weather. This lets you.
 
 

iStat Menus – Free download and software reviews – CNET Download – Get more done from your desktop!

 
There are other utilities you can DL as well but I think this is the best. Note sure why this was voted down, this is a great app. Email me when someone replies to this comment. Opening the menu shows a list of the apps using the most memory. Hotkeys to open and close menu dropdowns, for quick keyboard access.

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The most powerful system monitoring app for macOS, right in your menubar. iStat Menus covers a huge range of stats, including a CPU monitor, GPU, memory. The most powerful system monitoring app for macOS, right in your menubar. iStat Menus covers a huge range of stats, including a CPU monitor, GPU, memory. An advanced Mac system monitor for your menu bar, with CPU, GPU, memory, network, disk usage, disk activity, temperatures, fans, battery info and more.