Microsoft Shortens Recovery Rollback Period to 10 Days in Windows 10 Anniversary Update
According to a Microsoft spokesperson, it was a data driven decision to change this rollback timeframe from 30 to just 10 days:
“Based on our user research, we noticed most users who choose to go back to a previous version of Windows do it within the first several days. As such, we changed the setting to 10 days to free storage space used by previous copies.”