Hello and welcome to the forum
Why did you feel that you had to uninstall it?
What method did you use to unistall it?
Did your initial installation, a few days ago, happen with no problems?
Where did you get krita from and how did you install it?
When you reinstalled it, did you do this using the same method and from the same source?
Are you sure you have enough space on your C: drive?
I stay away from Windows installation problems because they can be complicated. Your answers to the above questions may give a clue to someone who does know about this sort of thing.
It is possible to bypass this problem altogether if you use the portable/standalone .zip package for Windows. Download the .zip package from here:
It will then be in your Downloads folder. Right-click it and select Extract and accept the suggested name for the destination folder. That will spend a little bit of time extracting the contents of the .zip package to give you a folder called krita-x64-4.3.0. Inside that you’ll see a file called ‘krita’ (or ‘krita.lnk’, it’s a Windows shortcut file). Double click it to run it and then you’ll be running krita 4.3.0.
(I use portable .zip files wherever possible because it’s much simpler and less complicated than installing stuff and possibly having to uninstall and reinstall stuff. That’s probably just me though.)
Edit: Factual Correction:
If you want to have a shortcut on your desktop to run it, go into the ‘bin’ folder which you’ll see in the same listing as the krita(.lnk) file, find krita.exe in there and make a shortcut to it then move the shortcut to the desktop.