I'm troubleshooting a Windows 11 laptop that becomes extremely slow and sometimes freezes for one or two minutes, even with only a few browser tabs loading. It has 16 GB of RAM and a 1 TB Silicon Power SSD, so I wouldn't expect this behavior. Malwarebytes found one suspicious file and quarantined it, and I removed several gigabytes of temporary files with CCleaner. CrystalDiskInfo reports that the SSD is healthy. I've also disabled unnecessary startup items and removed some bloatware. Task Manager shows 100% disk usage, but the listed processes generally appear to be using less than 1 MB/s, which seems too low to explain the maximum activity. What else should I check?
4 Answers
If the issue continues, check the storage controller and its driver in Device Manager, along with Event Viewer for disk, controller, or reset errors. A generic AHCI driver or an SSD firmware/controller problem can cause long freezes even when Task Manager shows relatively low transfer rates. Back up the data before changing BIOS or registry storage settings, and don’t apply an AHCI/MSI registry fix unless the controller and event logs specifically point in that direction.
Start by checking Task Manager’s Processes or Details tab and sort by the Disk column while the slowdown is happening. The process causing the activity may not be obvious from the overall percentage. Also check Resource Monitor, which can show disk queue length, read/write activity, and which files are being accessed.
As a diagnostic test, temporarily stop SysMain and Windows Search in Services and restart the laptop. Those services can sometimes create heavy background disk activity, although disabling them permanently isn’t always necessary. Security software can also be involved, especially since Avira and Malwarebytes were both accessing the drive, so avoid running multiple real-time antivirus products together.
CrystalDiskInfo mainly reports SMART health information, so a drive can appear healthy while still having performance or controller problems. Check whether the SSD is nearly full, confirm that Windows is running TRIM through Optimize Drives, and install any available SSD firmware and laptop chipset/storage-driver updates. If possible, test the laptop with another known-good drive or run a proper storage benchmark.
I checked Task Manager, but the system reported 100% disk usage while the visible processes were only doing a fraction of a megabyte per second. I’ll check Resource Monitor as well to see whether it provides more detail.