When I click on a desktop icon, of late the program is very slow to open; after a few minutes waiting with just a blank screen, I will click on the tab to close the screen and suddenly the program appears. This is unusual, but it happens all the time.
More aboutopening programs
First update and run your anti-virus software. Then download, update and run malwarebytes, free. Then defragg your hard drives. Let us know if this helps.