Why your laptop struggles from April to July
Most laptops are engineered around a 25°C room. An Indian summer afternoon hands them 38–45°C ambient air, which means the cooling system starts the day with a 15-degree handicap. Add two or three years of dust packed into the heatsink fins and thermal paste that has dried to chalk, and the laptop has no choice but to throttle, cutting CPU speed to survive.
That's why the slowness feels seasonal. The hardware isn't older in May than it was in January; it's just hotter. Heat also quietly accelerates battery wear and stresses every component on the board, so this is worth fixing, not just tolerating.
Confirm it's actually heat
Symptoms of thermal throttling: the laptop is fast for the first few minutes and then crawls, fans run loud and constant, the keyboard deck feels hot, and games or video calls stutter after a warm-up period. On Windows, open Task Manager → Performance and watch the CPU clock speed drop under load; free tools like HWMonitor show temperatures directly. Sustained 95°C+ under normal work means the cooling system needs attention.
Not every slowdown is thermal, though. If the laptop is equally slow cold and hot, look at a full disk or too many startup programs instead, heat is the diagnosis only when speed and temperature move together.
Free fixes first
Try these before spending anything, together they often bring temperatures down 10 degrees or more.
- Get it off the bed and pillow: soft surfaces seal the bottom intake vents completely, use a table, or even a large hardcover book
- Raise the rear by a couple of centimetres (a ₹500–900 laptop stand, or two bottle caps) to open up airflow
- Switch the power mode from 'Best performance' to 'Balanced' for everyday work
- Close the startup apps and browser tab graveyards that keep the CPU busy at idle
- Keep it out of direct sunlight and away from the wall, exhaust needs somewhere to go
When it needs a proper service
If the vents exhaust little air despite loud fans, or temperatures stay high after the free fixes, the inside needs cleaning. A professional thermal service, full dust removal from fans and heatsink fins, plus fresh thermal paste on the CPU and GPU, starts from ₹999 and takes about an hour. Gaming laptops with dual fans start from ₹1,499. If a fan bearing is grinding or a fan has died entirely, replacements typically start from ₹1,299 depending on the model, final quote after free diagnosis.
We don't recommend DIY repasting unless you're comfortable fully disassembling your specific model, on many thin laptops the heatsink screws have a tightening order, and getting it wrong cracks dies or warps heat pipes.
Don't let a summer of throttling become permanent damage
A laptop that runs at 95°C all summer doesn't just feel slow, it cooks its battery, dries its paste faster, and stresses solder joints with daily expansion cycles. Many of the dead graphics chips and swollen batteries we see in August trace back to a summer of unchecked throttling. The fix is cheap; the consequences of skipping it aren't.
If your laptop is hot, loud or crawling, book a free diagnosis with Zerofix before the peak heat arrives. We'll measure the actual temperatures under load, show you the dust situation inside, and quote the exact service it needs, usually with same-day turnaround.
