Windows Vista will accept incorrect passwords, at least on system s set up to use multiple keyboard layouts. It's probably "a convenience to the user", but it seems odd that they would add such a convenience, and then continually bombard the user with inconvenient "are you sure YOU clicked that .exe file?" dialogs.

Yes, that's right. A loyal Windows user of more than 15-years is throwing in the towel on Vista. You can read his story for why he finds Vista so annoying, but I'll sum it up for you: Vista sucks.

I have been using Vista for well over a year now (since Beta 1). Of course Vista is slow, its bloated (over 10x the size of XP), aero kills system performance (even though this should be done on the video card), networking is pathetically slow, etc etc. We all know Vista sucks.

But recently my blood has been set to a rolling boil by the fact that most of my games just don’t work in Vista. At all. Its so bad that out of spite I have decided to make a list of games that work better in Linux under Wine than in Vista. These are games that were originally written to run in Windows XP, are broken in Vista, but magically work in Linux.

"In contrast with Linux and even OS X, [Vista]’s expensive and bloated. Vista’s look may be shiny and attractive, but users aren’t being fooled by what their eyes are seeing. Everywhere you turn on the Internet, it’s easy to find another story of a loyal Windows user who after trying out Vista on their own machine has decided to downgrade to XP."

Is Windows Vista the biggest PR failure in Microsoft's history?

After Vista SP1, the worst that will happen is a warning notice that forces a 15-second delay at login, and a reminder every hour on the hour to activate.
Gates famously stated in the past that if people pirated an OS he would prefer it to be Windows. Microsoft forgot this for a while, but there is a glimmer of a re awakening. Don't be fooled by the bad product that is Vista. There is a long way to go before Microsoft runs out of money!

The "Windows Vista Capable" lawsuit took another step toward trial—or settlement—Tuesday when US District Court Judge Marsha Pechman denied Microsoft's request for dismissal. The suit was filed in March by a pair of miffed PC buyers.

Not only did Windows Vista - billed by Microsoft as its biggest operating system for 10 years - fail to distinguish Microsoft's latest fiscal year from previous, non-Windows-Vista years, but Microsoft also missed its own expectations by several million dollars.

The evidence shows that Microsoft’s marketing department has not done particularly well with Windows Vista. Almost every story you see about Vista is a negative one. Even I, as a Linux user, think that Vista is better than its reputation. But Microsoft’s marketing is not always a failure, it appears.