Vista/Win 7/Win 8 Help

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First, you've got my sympathy!  I love my XP box!
Second, some actual advice.
If you're looking for installation help, don't install to C:/Program Files/EA Games.  Install to C:/EA Games instead.  Same goes for utilities, which should be installed to C:/Sims 2 Utilties or the like.  This bypasses the "nanny state" protections on C:/Program Files.
If you've already installed to C:/Program Files, you'll have to deal with the nanny state on an incident by incident basis. 
Modifying text files or creating zip files:  Most text editors and compression utilities can't handle saving to C:/Program Files; to modify a text file located there, you'll need to save your files elsewhere, such as Desktop or My Documents, and drag them to the correct location.  Same goes for making zipped backups of files you're going to delete using my No More Ugly Maxis Created Townies tutorial or BoilingOil's Keeping Your Sims 2 Installation As Small As Possible tutorial.
After dropping the dragged file, you may be prompted for an administrator password if you are not logged into an administrator account.

Why I have an Electronic Arts folder and an EA Games folder...

Stolen from Ancient Highways at Simbology:

"EA decided to create EA Games and Electronic Arts in both the public and user libraries, and with Microsoft deciding to combine the public and user trees under Libraries instead of keeping them separate as Public Documents and User Documents, confusion among the user base has reigned supreme.

"If you click Properties on the Empty folder, it should point to the folder in the public tree.  You can uncheck the box to show the folder and you'll never see it again.  The game ignores the public folders completely.

"So, why have a public folder?  If you share the computer with someone else that plays TS2, or any of the Stories, you could put copies of your favorite downloads into the public folder and share them with other computer users.  If two or more computers are networked together, using Home Group or a small server, other computers on the network can read the public folders you mark as shared.

"But for a single user, non-networked computer, public folders and sharing are confusion.  Ignore them.  Hide them.  Forget they exist.  If you ever need them, ask your grandson or the high schooler next door."

More stuff I didn't know.  But then, I'm running XP and didn't need to know!

Another approach

Swiped from Aaroneous at Simbology:
"For those that don't know You can disable Windows from protecting it's self by disabling UAC(User Account Control). It's anther feature MS added in Vista(and newer OSes), Which basically is suppose to help prevent viruses and the user from damaging the computer. As usual though it's more of a pain in the butt, Then actually useful."
Never knew this; I just installed elsewhere....