My Windows 11 desktop suddenly changed appearance. A white outline appeared around many windows, the title bars looked different, and the entire display became grayish and lower quality. I had not installed or downloaded anything recently; it started unexpectedly when I turned on the computer to charge my controller. The problem seemed to worsen after running a Malwarebytes scan. CPU and memory usage reached around 70%, and I could not use Settings, Task Manager, or the power menu to reset, shut down, or restart the PC normally. I eventually forced a crash and started a local Windows reset. I'm unsure whether this is actually malware, a driver problem, or hardware failure, and whether a local reset will completely remove the issue. What should I check?
3 Answers
This may not necessarily be malware. A corrupted or missing graphics driver, Safe Mode, accessibility settings, or a hardware problem can make Windows look gray, change window borders, and reduce visual quality. Malware often tries to remain hidden rather than visibly damaging the operating system. After the reset, install the proper graphics driver from the GPU or computer manufacturer and check whether the display returns to normal.
If the computer crashes again, look in C:WindowsMinidump for crash-dump files. Those can help identify a failing driver or hardware component. Also check whether Windows was running in Safe Mode, confirm the display resolution and refresh rate, and inspect Device Manager for graphics-driver errors. High CPU and memory use during a malware scan alone is not unusual, especially on a system with a slow disk or damaged Windows files.
A clean reinstall is the safest option if you genuinely believe the system is compromised. A local reset can reinstall Windows, but depending on the options chosen, it may not remove everything from every drive or address a compromised account. Back up only personal documents and photos, avoid copying programs or unknown executables, then use Windows installation media to delete the existing system partitions and perform a fresh install. Change important passwords from a separate, trusted device afterward.
I’m still concerned because Task Manager and the reset controls appeared to be moving or becoming unusable. That felt more like malware than a display-driver issue.