How to rollback changes in pc?

Question

Windows

for example, a couple of days ago

to roll back the changes

Answer 1

Computer - properties - system protection - restore.
Rolls back to any of the saved restore points.
By default, points are created only for certain system events, such as software installations and updates. You can do it manually, or add a task to the scheduler.
It does not affect user data.

Answer 2

Without a "human description" of the problem.
No way.