Many times it is not entirely the OS (Windows 7) that is too blame, but software having difficulties rewriting for the OS. For Audacity, fo example, have a look here:
Lame_enc.dll - Lame_enc.dll Not Found - Download LAME MP3 Encoder - Audacity LAME MP3
The message "(approx) "you do not have permission....etc" is not generated by the UAC, which only gives a warning message and no other protection.
You do not specify any further, which particular parts you do not have permission for?
Some of the folders which you previously used in XP, are now, for backward compatibility, used only as junction folders. When an older program is installed, these folders redirect to the new folders, which are all now accessible under username. You cannot enter these folders with adjusting the security, and it is unwise, even then, to do so.
You can improve the situation by opening the "Global" administrator account. To do this:
There are a couple of ways:
Open a command prompt(Run as Administrator.)
Type the following command and enter.
net user administrator /active
Log out and see if you have a new alternative login, as well as your existing one. If not, do it the long way.
Shut down the computer for a cold boot. Tap the "F8" key as you are booting.
Select "
Safe Mode with networking" from the boot menu.
Log into windows 7 with your personal account that holds the administrator access.
Open a command window (START--->RUN--->CMD.exe). At the command prompt type the following
net user administrator /active
Log out and log back in as administrator.
Another way
Go to Start
Type Control UserPasswords2. (or Open the Start menu, and type lusrmgr.msc )
Click Advanced.
Click Advanced again.
Select Users.
Select Administrator and untick the the box “Administrator is disabled”
Now log out and login as Administrator.
The action leaves you a little more vulnerable to outside attack. Not a big issue if you are confident with your anti virus control etc.