Recently I began seeing some errors upon startup in Event Viewer. It shows an Event ID of 1111 and here's what the error says:
.NET Runtime Optimization Service (clr_optimization_v2.0.50727_32) - Service reached limit of transient errors. and a second error shows .NET Runtime Optimization Service (clr_optimization_v2.0.50727_64) - Service reached limit of transient errors.
When I start both ngen services, they start and then stop almost immediately. Then the errors show again.
Now when you Google this stuff, mostly the solution offered is that you need to reinstall Windows Vista, because .NET v2x and 3x are integrated with the OS. However, I can't believe that there's not a way to repair .NET by grabbing files from install.wim off the installation DVD-ROM.
Besides, my system works great in most other respects.
I have attempted removing about four or five recent .NET v2x updates, and reinstalling them. I figured that might re-register something. But no go.