“My computer is slow” might mean waiting to sign in, waiting for a program to open, or waiting for a website. Before paying for a replacement computer or a faster internet plan, describe the delay more precisely.
The aim is to choose a sensible next investigation. You do not need to diagnose the fault yourself.
Start here
Where does the waiting begin?
Choose the closest match. This describes the symptom, not its cause.
Start with one ordinary task
Pick something you normally do and describe where the waiting begins. Avoid changing settings for this first comparison.
| What you notice | A useful description |
|---|---|
| Waiting before you can use the desktop | “The delay starts when I turn on or sign in.” |
| Waiting for a familiar program or a file already stored on the computer | “This local task feels slow too.” |
| Local work seems normal, but websites take time | “The delay is mainly online.” |
| Only one website or online app misbehaves | “Other online activities appear to work.” |
If the delay starts on the computer
Microsoft identifies limited storage, background startup apps, outdated software and older hardware among possible contributors to poor Windows performance. Closing unused apps and restarting are among its suggestions. Save your work before an ordinary restart and do not interrupt an update. Read Microsoft's Windows performance guidance.
If the main wait happens at startup, use our slow-startup guide to distinguish the stages. You do not need to disable unfamiliar software, delete files or install a “speed booster” to prepare useful notes.
If the delay is mainly online
Try another familiar online activity, and note whether another device on the same home Wi-Fi has similar trouble. A working connection can still leave a particular app or website with a problem. Microsoft's connection troubleshooting includes checking a second device.
Record the room and time as well. If you make speed comparisons, nbn describes checking beside the router and in other rooms, with a wired comparison where practical. See nbn's guidance. One result is a reason to investigate, not a purchase recommendation.
Our Wi-Fi dropout guide includes a comparison table and a short symptom diary you can use.
Turn the observation into a useful question
What to read next
If you’d rather have local help, see our slow computer assessment.