A gradual slowdown usually has a mundane cause. These steps are safe to try yourself and often help. If none of them makes a difference, raise a ticket and tell us what you tried.
- Restart the computer properly, rather than closing the lid. Many machines go weeks without a real restart.
- Open Task Manager with Ctrl+Shift+Esc and look at the Processes tab. Sort by CPU and then by Memory to see what is using the most.
- Check how much free space the main drive has. Below about 10% free, Windows slows noticeably.
- In Task Manager, open the Startup apps tab and disable anything you do not need running from boot.
- Install any pending Windows updates, then restart again.
If the machine is slow from the moment it starts, or you hear unusual noises from it, stop and get in touch — that can point to a failing drive, and continuing to use it can make things worse.
This is general guidance, not a guaranteed fix. The same symptom can have different causes on different machines. If you are unsure about a step, or it does not help, raise a ticket and tell us what you tried.