Troubleshooting System Slowness Issues By To isolate the issue is not software related: Boot to Linux... Make sure heatsink has good contact with CPU. Replace thermal... Fix it Check and see if the cooling fans are work and free of dust. Check system performance to see if any process is taking up all... You should have at least 512MB and 1GB if you are a heavy user. Check your hard drive’s health End process and Reboot. Issue persist? Is the computer overheating? Add more memory Issue persist? Does your system have sufficient memory? Replace hard drive Some board have build-in tools in the BIOS for testing hard... Troubleshooting system slowness issues