Problem UNO R3 with my Win7

Every time I connect my UNO R3 to my Windows 7 dsktop, I have to install Arduino drivers. Why can't my system recognizes my UNO board?

There could be a few reasons for that.

is it your OWN PERSONAL computer ?
If it not your own, you would need to talk to your IT ADMIN to get permissions.

What security do you have installed by way of antivirus / antimalware ?
You may need to add some locations to your EXCLUSIONS / WHITELIST

Which version of the IDE ?

Is there any further information you can add to help diagnose the problem ?
See the posts near the top of the forum.