Computer Slow After Windows Update
The computer ran normally before a Windows update installed, and has felt noticeably slower ever since, in ways not explained by anything else changing.
Quick answer: Slowness immediately after an update is often background activity finishing off — re-indexing files, finalising driver updates — which can take a day or so to settle. If it's still slow well after that, a specific update or driver conflict is a more likely ongoing cause.
Likely causes
- Background processes still finishing post-update tasks (re-indexing, driver installation) that settle down after a day or so
- A specific update introducing a bug affecting performance on your hardware
- A driver that became outdated or incompatible after the update
- New default settings enabled by the update, such as additional background services
What you can safely check yourself
- Give it 24-48 hours if the update was very recent, since background settling is common and temporary
- Check Task Manager for anything unexpected using high CPU or disk consistently
- Check whether a specific graphics or storage driver needs updating following the Windows update
When it needs a proper look
If it's still noticeably slower several days after the update with no obvious cause in Task Manager, that's worth a proper look — sometimes rolling back a specific update is the most direct fix.