Disabled ((hot)) — Osa.dll

After applying the fix and rebooting, CPU usage returned to normal and Office applications launch without issue. Hope this helps anyone else dealing with legacy software artifacts!

[SOLVED] High CPU usage caused by osa.dll (Office Startup Assistant) osa.dll disabled

If all else fails, a full reinstallation of Microsoft Office may be necessary to resolve deeply corrupted files. Summary Table After applying the fix and rebooting, CPU usage

(Office Source Engine or Office Startup Assistant) is a legitimate component of Microsoft Office [1]. It is designed to work in the background, assisting with the smooth operation of Office applications, handling components of the Office Source Engine (which manages installation files and updates), and facilitating integration between different Office programs. After applying the fix and rebooting