The computer is slow to boot, I don't know what is going on?

Recently, my boot prompt has a string after the press del to run setup. The stay on this screen is quite long. I have to wait a long time to get into the system. I don't know where the problem is. I haven't found any virus in my antivirus. The computer configuration is not very good. I used to boot up a lot faster than now. I don't know what it is. The reason is that the boot speed is very slow, and I don't want to reinstall the system. It is very troublesome to have a lot of software reinstalled. User analysis and answer: 1, set the first boot item of the hard disk, unplug the optical drive and the data to see if the optical drive is broken. 2, sometimes related to the hard disk, you unplug the hard drive cable data cable to see. 3, is not too many startup items, check it. 4, let you press the del button to set, what is behind, it should be behind the prompts you have any problems with the settings. 5, in the BIOS, what memory self-test is turned off, the boot speed will be very fast, MEMORY TEST this is set to ENABLE try. 6. There is really no way to reinstall the computer system.