To handle OS updates efficiently and minimize downtime: 1.Schedule Updates During Off-Peak Hours: Apply updates when user activity is low. 2.Test Patches First: Use a staging environment to identify issues before production deployment. 3.Automate Updates: Tools like WSUS streamline the process and ensure timely patching. 4.Use Rolling Updates: Update servers incrementally to maintain system availability. 6.Communicate Downtime: Notify stakeholders in advance with a clear timeline. 7.Backup & Rollback: Take backups or snapshots and have a rollback plan for quick recovery. 8.Phased Rollout for Users: Deploy updates to a pilot group first to ensure stability. These strategies balance security and productivity efficient and secure.

1. First apply the updates to the Test machines, wait for one week and then need to apply in production machines 2. We can use Automation tools that available, but make sure there a manual interaction also, since there are many chance that can apply wrong patch. eg: MS will give information about some patches and its identified issue. so review it and apply it according with our environment. 3. Its not practical that we can take snapshot/checkpoint of every server (1000+ Devices), make sure the daily backup(weekly full & incremental) procedure of the machine happening 4. Patches we can install it in working hours also, but make sure the reboot of the device happening only after business hours or the downtime that provided by the business.