Q:

Windows 8, many setup files don't start, unless I run them as administrator

I recently installed Windows 8 on my computer. I have just one user, connected to a Microsoft account.
My problem is that many setup files (Chrome, Flash, Dropbox, just to mention a few), if launched with a double click, just don't start. If I right-click and choose run as administrator they run fine. Is this normal on Win 8, or there's a problem with my configuration?
EDIT
I temporarily solved the problem by creating a new local account, but after some days the problem started again.
Installers that have problem include:

The nVidia graphics driver installer
Chrome setup
Dropbox setup (I solved this by modifying the temp directory permissions allow read/write access to Users)
Steam install (MSI installer) gives error 1723 "A DLL required [...] could not be run"
Google Play music manager (if I run it as admin, the prorgam is installed but with graphical problems)

A:

Check your UAC settings. Sounds like you've got it set to Always Deny or disabled entirely so that you're not being prompted to approve elevated access.
Alternatively it may be a permissions issue. Make sure that AppData\Local\Temp is set to allow Administrators full access, Users read-only access and YOURUSERNAME full access.

