The ICUE may be running as a startup item or it may, in fact, be a driver installed in the system. Using the "Control" "Alt" and "Delete" keys to enter the Task Manager you may find Icue is running in the list of running processes or it will be listed in Startup apps. If it is a process you can right-click any process and End Task. If it disappears from the list. You can then delete the Icue folder manually. If the Icue is not an executable but an APP from the Microsoft App Store (very similar to a phone App, not really a program, it may not possibly show as a process). If it is a startup app it can be disabled. (right-click then disable, that does not delete it or remove the startup registry line it just stops its function and turning-on) (You can also type "task manager" in the search box to access it)
Now, there are two other tools, you can use to delete programs and apps. You can use Ccleaner Free or Pro and go to Tools and both Executables and Apps will show and can be uninstalled there. The second Tool is Revo Uninstaller Pro Portable, which is the most professional way of uninstalling. It is not free. This tool uninstalls the program/app and then all the leftover registry lines that Programs and Features and CCleaner leave behind. You can also Hunter mode and point to the Icue folder and it will hunt all instances of connected leftover Icue crap. This is if the program does not show in the uninstaller list. (Note: you must click on the RevoUPPort.exe to start Revo inside the Portable's folder). This is a standalone program, it does not install itself in the registry, so it can run from a flash drive if necessary, hence the word "portable". There is a Free version of Revo, but you lose the force uninstall feature. I have repaired more machines and cleaned up more unwanted Apps and Programs with Revo than I can count and I cannot live without it. Remember this is a powerful program so be careful. Note: when you are finished with the first step of an uninstall (even with Revo) this is where "Programs and Features" ends its Job, you must SCAN for leftovers to remove the registry lines and leftover system crap. "Programs and Features" and Ccleaner do not do this and both depend on the built-in uninstaller from the original install of any program or App. If the original coder does not write an uninstaller or if the uninstaller gets corrupted It will not uninstall anything and Revo is the only option using Force Uninstall or Hunter Mode. How to use Revo
There is one last invaluable tool for uninstalling. It is called "Search Everything" by Void Tools and it is free. You can search for ICUE and Corsair in the search window and find all instances of this crap. Right-clicking a search result and going to Open Path will take you to the item's real location, which may be helpful for using Revo Force Uninstall mode. Note the search function time to completion in Search Everything is much, much, faster than Microsoft's P.O.S. built-in search function. This program comes in portable form as well.
If a program or App does not uninstall cleanly with its own uninstaller it is poorly written code to begin with. If a user is upgrading a program by reinstalling over the older version and the program does not recognize that it is an upgrade during the install it is poorly written code.
Hope this helps.