Common problems
Computer is really slow
Most slow computers aren't broken. They're weighed down by startup programs, a nearly full drive, or an old spinning hard drive.
Signs
Takes minutes to start; the spinning circle shows up constantly; programs freeze; the fan runs loud even when you're not doing much.
Try this first
Restart it (a real restart, not just closing the lid). Uninstall programs you don't use. Make sure there's at least 15% free space on the drive. Let Windows or macOS finish its updates.
What we do
We check the drive's health, clear out startup clutter, and remove junk programs. If the computer still has a spinning hard drive, swapping it for an SSD usually makes it feel new again.