As Tonydb says, use Revo Uninstaller, it can search for EVERY thing
related to an installed program and remove it from a computer, no matter which drive it's on. If you have downloaded sim aircraft and/or scenery
outside of the install folder, then it'll still be safe.
Revo Uninstaller FreewareI've used it for about 15-20 years. Works great.
There are times though when you don't want to use Revo if you want to reinstall a program. Some programs will "hide" a license key/file somewhere on your drives. Revo will hunt down everything related to the program that you want to remove, including hidden files.
For cases where you
DO NOT want the hidden license key/file deleted, use the windows uninstaller. Three of the programs that I use, that have hidden license keys/files are FSUIPC, SPAD.neXt, and OpusFSI.
But
DO use Revo for FSX/P3d instead of the Windows uninstaller.
As to installing your flight sim on a drive other than the C: drive
(as you've done), I highly recommend it.
A useful tip is to change ONLY the drive letter when the installer suggests using the standard location. For instance, when it suggests;
C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\change it to
D:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\From then on, if any program wants to use
C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\, you only have to change that one letter.
BTW - the location name "
Program Files (x86)" is only a special location when used on the C: drive
After removing the flight sim, you could use the built in Windows drive checker to be sure that your drives are in proper working order. Usually no need to reformat it.