Why did an update break something that worked, and how do you roll back?
Because an update changes a component other things depend on — and the thing that breaks is frequently not the thing that was updated. Understanding that relationship explains both why it happens and why the fix is rarely in the application that appears broken.
Why updates break things:
Dependency changes. An update alters a shared library, framework or driver, and software relying on the old behaviour stops working.
Removed or changed features, where something you depended on was deprecated.
Tightened defaults, particularly security and privacy settings — permissions that used to be granted are now blocked, which looks like a broken feature rather than a policy change. This is one of the most common causes and the least obvious.
Driver incompatibility, especially after an operating system update on older hardware.
Configuration reset, where settings revert to defaults.
Partial or interrupted updates, leaving an inconsistent state.
Hardware no longer supported, where the update was never intended for your device.
How to diagnose:
Establish what changed and when. If it worked yesterday, look at what updated overnight — operating system, application, driver, browser, or a service on the other end.
Check whether it is only you. Search the version number plus the symptom; widespread issues are usually documented within hours.
Check permissions, which is where tightened defaults show up.
Test a different account or a clean profile, separating configuration problems from system ones.
How to roll back, in order of preference:
System restore points or snapshots, which is the cleanest route where available.
Uninstall a specific update, possible for many operating system updates within a limited window.
Roll back a driver, which device management tools support directly and which fixes a large share of post-update hardware problems.
Reinstall a previous application version, then disable automatic updating for it until fixed.
Restore from backup, the last resort.
Why you should still update. Most updates close security vulnerabilities, and staying on an old version is a larger risk than the inconvenience — so roll back, report, and return once fixed.