It shouldn't. Something is wrong on your machine. Very hard to tell what. Tell us about your machine. Operating system, any antivirus installed? External disks? Do you store your images on an external disk? etc. etc.
I've had this machine for 2 years and had no problem with light room before. this started two days ago. Thank you.
Did you change anything on your computer recently? A system update? Add a peripheral? Anything?