High DPC latency on Windows 11 almost always traces back to one of a small handful of usual suspects. Before you start uninstalling drivers at random, it helps to know what actually causes it — and the order in which to check things.
The most common causes, in order of likelihood
Wi-Fi drivers (especially older Realtek and Broadcom chipsets) top the list, followed by USB 3.0 controllers with aggressive selective-suspend settings, then outdated chipset or storage drivers. Audio drivers cause the most noticeable symptoms even when they're rarely the actual source.
A practical fix order
Start with Windows Update and the manufacturer's own driver page (not just Device Manager's "automatic" driver, which is often older). Next, disable USB selective suspend in Power Options. Only after those two steps should you consider disabling Wi-Fi power saving or rolling back a recently updated driver.
When to suspect a specific driver
If a scan consistently points to the same .sys file regardless of what you're doing on the PC, that's a strong signal — check that driver's release notes for known latency issues before assuming it's a hardware problem.