Windows VISTA: 20 million units sold in February alone

I was trying to set up a daily backup, simply copying all my stuff from one hard drive to a second one, without any kind of compression.

Vista stores all my documents and settings in a single folder called /users/AK. So all I had to do was back up that entire folder.

I tried Microsoft's own (and excellent) RoboCopy tool. It gave me an error. I tried 2BrightSparks's (also excellent) SyncBack. Another error. I tried a neat one I found called Karen's Replicator. Ditto.

All three had the same problem: A path was too long. I apparently had too many nested folders.

I looked more closely and found the problem. They were all trying to back up C:\users\AK\Application Data \Application Data \Application Data \Application Data ? and so on, ad infinitum.

Huh?

I Googled and found the answer. Vista stores its application data in a folder called AppData. Previous version of Windows used \Local Settings\Application Data.

To make sure old programs can find the new folder, Microsoft added hidden files called "junctions." If a program tries to access "Application Data" path, the junction sends it to "AppData."

I had run into an infinite loop. The Application Data folder redirected the software to the AppData folder, where somehow there was some reference back to Application Data. It looped forever.

The only way to fix a screwy junction was by using one of a handful of obscure programs some obscure programmers have created, all of which warn you, essentially, not to use them. Ironic, but true. Still, I messed and removed the troublesome hidden file and my backup software started working.

Other problems ranged from the mildly annoying (there's no simple way to remove items from the "New" context menu) to the absolutely frustrating.

In that latter category is the latest bugaboo: Photoshop suddenly decided to stop working. It told me "an error has been detected with a required application library" and refused to run. No amount of coaxing would change things, and neither running the program as Administrator nor reinstalling helped.

Finally, after much searching, I found the only solution that worked: I got Vista to reveal its hidden Administrator account, which I logged into. Now Photoshop works. So I moved all my stuff and now I log in as Administrator. I'm not supposed to ? it's a security risk ? but it's that or do without Photoshop.

Even as Administrator, minor problems persist. Shortcuts to search folders cause Windows Explorer to crash. Photo Gallery doesn't rotate images properly. In short, unlike with XP, when I sit down I'm never 100% sure things are going to work properly.