Acer Nitro V 15 is running very slowly

A Nitro V15 that has become slow is nearly always running in the wrong mode or throttling, because the hardware is strong for its class. Nitro Sense sets the performance mode, and Quiet mode holds clocks back, so check it first. On battery, Windows and the laptop reduce power, so a game that ran smoothly plugged in will stutter unplugged. Heat is next: clear the vents and use a hard surface. A background process, a nearly full drive or an old BIOS and graphics driver complete the list. If the fan does not spin or Nitro Sense shows no modes, as one owner of the ANV15-51 reported, reinstall Nitro Sense and update the BIOS. A laptop that is slow only in one game should have that game's settings lowered.

Check how the laptop behaves in Safe mode or after a clean restart, since a slowdown that disappears there points at a startup program or a driver. Windows Task Manager's Startup tab lists what loads at start-up, and disabling items you do not need makes the laptop quicker to start and lighter at rest. Games on the Nitro respond well to updated NVIDIA drivers, so install the latest Game Ready driver. Nitro owners on the Acer Community often report that Windows Update replaced the graphics driver with a generic version that reduces performance, so check Device Manager's display adapter driver date and compare with Acer's and NVIDIA's pages; reinstalling the proper driver restores speed. Pausing Windows Update's driver downloads for a while stops the replacement happening again.