Windows 11 Search Function Suddenly Stops Working

This morning, after turning on my computer, it was unusually sluggish. During the reboot process, the system froze, so I held down the power button to force a shutdown. After restarting, the system responded normally, but I noticed that most of Windows' native search functions were malfunctioning: the search box disappeared, was unresponsive, or wouldn't accept text. At first, I suspected that I had accidentally deleted a component using RevoUninstaller two months ago, but the system had been rebooting normally until then. Additionally, some system applications are running abnormally and take a very long time to open.

I've already tried running the troubleshooter and selecting the Reset this PC (keep my files) option, but neither resolved the issue.

Specs:

• CPU: AMD Ryzen 9 9900X
• RAM: 32GB
• Graphics Card: NVIDIA RTX 5080 (16GB), AMD Radeon Graphics
• Storage: 209GB used / 1.82TB total
• OS: 64-bit Windows 11, Product ID: 00342-22935-85203-AAOEM