I have recently converted the storage device from a hard disk drive (HDD) to a solid state drive (SSD, 500GB, 10,000 yen) in the computer that I use almost every day, which has
greatly improved the start-up speed.（The memory has already
been expanded since about a year ago with an additional new one costing 4,000 yen, which has made the processing speed much faster.)
And I also bought a used memory (4GB, 1,300 yen) for a single channel and have changed the original memory for dual channel in my old standby computer, which is rarely used,
into the to it, resulting in faster processing speed.