Slow laptop: how to speed it up without reinstalling (free step-by-step)
Laptops have quirks that desktops don't
Besides the common causes of slowness (full disk, too many startup programs), laptops suffer more from overheating, because ventilation is more limited, and from batteries that no longer sustain peak performance for long.
Step 1: Clean up startup
Open Task Manager (Ctrl+Shift+Esc), go to the Startup tab, and disable programs that aren't essential day to day — this alone already reduces the time until the laptop becomes usable after turning on.
Step 2: Check the power mode
Under Settings > System > Power, many laptops come configured in power-saving mode by default, which reduces processor performance. Switching to "Best performance" (when plugged in) can produce a noticeable gain.
Step 3: Check the temperature
Laptops accumulate dust in the vents over time, which raises the internal temperature and makes the processor reduce its own speed to protect itself (thermal throttling). If the laptop gets very hot and slows down during extended use, physically cleaning the fans usually solves it.
Step 4: Free up disk space
With the disk almost full, Windows loses room for temp files and virtual memory. Free up at least 10-15% of total capacity, prioritizing old installers and the downloads folder.
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Download PruPru.exe free →Frequently asked questions
Does replacing the battery improve performance?
A very degraded battery can make the system automatically limit performance to save power — in that case, replacing the battery can indeed help, besides fixing the battery life issue.
Is it worth upgrading the RAM of an old laptop?
If the laptop allows a memory upgrade (not all do nowadays), it's one of the most cost-effective ways to gain performance, especially if you tend to keep many tabs or programs open at once.