Can't Compile Anything - Windows 10

Hey All,
I've been playing with Arduino for years and just got a new laptop running Windows 10. I installed Arudino 1.0.6 and couldn't get anything to compile, not even a blink sketch. So I uninstalled and tried 1.0.5-r2 and get the same results. The error message I get is

C:\Program Files (x86)\Arduino\hardware\tools\avr\bin\avr-ar: unable to rename 'core.a'; reason: Permission denied

I've tried running Arduino as admin but I get the same error message.

How can I get this set up properly?

Thanks
Rich

SOLVED. I tried a couple of different versions and found that 1.5.8 works on Windows 10.

Is there a reason why you're using old versions?

I've been recommending 1.6.5-r5 (seems to be the least buggy 1.6.x version so far - 1.6.6 added some new functionality under the hood that has introduced several issues) for new installations.

DrAzzy:
I've been recommending 1.6.5-r5 (seems to be the least buggy 1.6.x version so far - 1.6.6 added some new functionality under the hood that has introduced several issues) for new installations.

Agreed, 1.6.5r5 works without issue on Win10, at least in the 3 machines I've done it on.