After installing the IDE 1.8.7, first install, on win 7-64 ultimate the arduino is not found after connecting only an usb2.0-serial was found.
Uploading was not possible. I have an COM1 port active and choosing this caused a time-out error. COM 4 and 5 not available.
Under windows it is very unlikely that COM 1 is your board as it is normally reserved for windows own use.
It sounds like you may have a CLONE Arduino in which case you may need other drivers.
These are most commonly the CH340/341 or CP2102
Also take some time to read the posts at the top of the forum as guessing what you actually have is something I am not so good at.
Installing them as Administrator is my own preference.
Unplug the board.
Install drivers.
Restart computer (often not needed)
Open Device manager.
Open COM & LPT ports.
Plug in your board.
With any luck you should see something pop up.
I have a clone.
After installing it worked.
Thanks.