Original post by: Seji the veggie ,
Old computers sometimes need a little bit more "umpf" to get them performing well again. If your computer allows it, reboot while mashing delete, F12 or whatever key opens up the BIOS. Load optimized defaults (reset all settings), then try again. If that doesn't work, boot back into Windows, then use the disk defragmentation tool in Windows to defragment the disk. This may take a while, depending on the size of your disk. If that doesn't work, it may be time for a drive upgrade to an SSD.