Hello JayneWilliamson0704, welcome to the Microsoft community, my name is Bruno Leonel, an independent consultant and I would be happy to help you.
Below are the recommended processes for cleaning Windows temporary files.
On the Desktop, press the Windows + R hotkeys simultaneously to open Run.
Now type TEMP and click OK.
The TEMP folder will open, please permanently delete all files inside the folder, if some files are not deleted it will be normal as they may be in use.
Again simultaneously press the Windows + R shortcut keys to open Run.
Type %TEMP% and click OK.
The %TEMP% folder will be opened, please permanently delete all files inside the folder, if some files are not deleted it will be normal as they may be in use.
Simultaneously press the Windows + R hotkeys to open Run.
Type PREFETCH and click OK.
The PREFETCH folder will be opened, please permanently delete all files inside the folder, if some files are not deleted it will be normal as they may be in use.
Note: You will not be able to delete some files that will be running, and a window will appear stating that the file cannot be deleted, click skip this file and continue cleaning the folder.
If the answer helped in any way, please mark it as an answer, if your question has not been solved, please post again.
I hope I helped, see you later!