The excel file icon turns white because the redundant files in FileExts affect the Excel file icon. Delete it to solve the problem.
1. Turn on the computer, press the Start key on the keyboard, and click the Run option.
#2. Fill in regedit in the pop-up input box and confirm to run.
3. Then click to open the .xls folder in HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts and HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\ .xlsx folder in Explorer\FileExts. The above two files need to be opened as shown in the figure.
#4. After opening, there are only two files left: OpenWithList and OpenWithProgids, and delete the others.
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