Glitched Automated Repair Utility – As several different users have reported, this issue can also due to some unidentified system drive issues.If this scenario is applicable, you should be able to resolve the issue by running repair utilities like DISM and SFC or by restoring the Windows installation to a healthy state using System Restore. It will become stuck in a loop if the utility is also affected by corruption. System File corruption – System file corruption can also be responsible for the apparition of the System Diagnostic tool at every system startup.In this case, you should be able to resolve the issue by booting your computer in Safe Mode and clearing out some space so the operation can complete without issues.
Insufficient System Space – As it turns out, this particular issue can also occur in instances where the system doesn’t have enough space to load up all processes and services that are necessary to the startup procedure.