Somehow, I clicked on the About item in the IE help bar, and it appeared: Error 53, There is insufficient storage space to complete this operation.

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I don't know what the reason is, alas! I searched online for a long time but I couldn't find a solution. It's not okay to reinstall IE. Although I don't feel any special impact, it's like eating a fly and I'm extremely uncomfortable. After turning it over and over without making a fuss, the system was finally rebuilt and it was over. Depressed!