I have had the problem for a few weeks without being able to determine a specific fact / new install that triggered this: when I try launching Windows 7 task Manager, the window opens, no program gets listed, it switches to non responding before crashing.
Nothing else gets affected, my computer seems to run ok, I have run various tools to see if it is infected (Avast, Panda / Kaspersky cloud AVs, CCleaner, MLAM...) and nothing major appears.
I checked the Memory, the drives, tentatively the registry, all ok. It is a pain not to have taskmgr though. The exe file is here in System32, unchanged for years, but simply crashes.
Any ideas on how to restore it ?
Thanks a lot,