I'm good to go... required manually uninstalling itunes and (well deleting the cache from the hidden files) and then I was able to download and install the official 10.1... plugged in iPad and updated without a hitch. This was the first time it didn't work for me through all the betas and ipods I've ever used... Lucky I didn't panic an lost nothing (via tiny umbrella popping me out and the fact I had saved a backup folder to desktop incase I needed to restore anything...
Bingo. It immediately discovered that I have a problem and asked permission to restore. I granted permission for everything. Took an hour an a half to download the new version ( iTune decides for it self what version to download), and another half hour to recover, At the end I got my "Darling " back with Factory default. Didn't care much since it was a month old and had almost Zero Stuff on it.
Bottom line. Seems to be some kind of bug that is on PC with Windows 7 the upgrade crippled my iTune 10.1 .
I gave up....no backup...starting over fresh. Sucks
To answer people about the problems I had with installing 4.2, I was using OSX, not Windows. So problems are not just limited to Windows users.
Things seems ok now except that my iPad Mail app now is stuck in one orientation. It won't rotate no matter how I turn the iPad. For everything else, the screen turns as usual. Anybody having this weird problem?
Windows 7 and Vista here. Both machines, same result. 4.2 failed upgrade, ended up restoring, lost all of my apps, the backup was worthless, can't even see my apps in itunes on the pc anymore.
I wish there was some way to tell itunes to redownload EVERYTHING in purchase history again???! is there?
Hasn't killed mine yet, but 12 1/2 hours latter and it's still in back up mode. Bar shows 7/8 done.
After similar difficulties to most on this thread I managed to upgrade to 4.2.1, but lost everything I had. Then I tried to restore to factory settings and get back my stuff from the last backup. iTunes seemed to take ages to estimate the time to restore all the data, so I lost my patience and cancelled the process. I guess I will restore my iPad once again tonight and before sleeping I will ask itunes to restore my apps from my latest backup. Hopefully something will be done by the morning. Nothing else has worked for me in getting my old apps back on my iPad.