i understand the issue and i see many more people had the same issue you can try these thing will help you for sure - if your hard drive is almost completely full, your computer may run noticeably slower. You want to leave your computer some room to work on your hard drive. Follow our guide to freeing up space on your Windows PC to free up room. You don’t need any third-party software — just running the Disk Cleanup tool included in Windows can help quite a bit . i use this link and got my system fixed by acer help and blog click - acer slow computer fix in simple steps and also please uninstall Uninstall unused/irrelevant programs This leads to a reduced speed. It is good to uninstall such programs and let your computer breathe freely. cut down some start up programs too they make you computer boot slow

i know i had the acer for like last 4 years. thease steps will help 1-just remove all unwanted startup programs they slow down the computer boot 2-remove all unwanted software using any software remover tool like revo uninstaller 3. check the computer R.A.M if possible please change or upgrade it . 4- for windows 10 or windows 8 user i would say visit Open Start Menu and find the Control Panel. Click on it. Here in the Control Panel, go to the Search field at the top-right of the window and type Performance. Now hit Enter. Now find Adjust the appearance and performance of Windows. Go to the Advanced tab and click on Change in the Virtual Memory section. Now untick the option “Automatically manage paging file size for all drives.” Select the default C: drive where Windows 10 is installed and then choose Custom Size. Then change Initial Size and Maximum Size to the recommended values by Window . lets see if this works and solves the problem with slow computer issue .