Just decided to install Vista on my iMac purely so I can play Company Of Heroes Opposing Fronts on it. On performance recommendations I used Boot Camp. My iMac is the last model (white) Fully specced to the max. Running latest Leopard 10.5.2. So I installed my copy of Vista Home and all went very smoothly apart from the following.
1: My Keyboard and Mouse are the Apple Wireless set and the Mouse pairs no problems, likewise the keyboard says it is in the Bluetooth panel but everytime I go to Vista I have to turn off the Keyboard and turn it back on again to get it to work. I have installed the latest version of Boot Camp for Windows 2.1. Boot Camp manual says to Choose your own Passkey but I can't type one in obviously since it isn't working at that stage so I have to select the default no passkey.

2: On rebooting to OS X my clock is wrong. Loads of suggestions on various forums but still no solution as far as I can see. Looks like it's been around for a year at least and doesn't look like Apple have fixed it. This is a home used Mac and all running wireless MIMO. Easiest fix is to open the time and Date and then just close it again and that fixes it.

3: This is a minor one but most times when I reboot from Vista to OS X the Volume UP and Volume Down buttons on the keyboard no longer make a clicky sound but they work. Doesn't happen if I go into OS X first up when I turn the Mac on.

Hope someone here has some ideas on these. None of them are major problems but annoying. Since being a Die Hard Convert from a Windows PC to the Mac I guess I've come to expect everything to work perfectly and in the 2 years I've had my iMac absolutely nothing has failed or gone wrong on it. As opposed to my Media Centre PC in the lounge which always seems to have something going wrong with it.

The clock thing is related to how Windows handles calculating the current time vs. OS X (and other OSs). It's not an Apple problem.

http://www.cl.cam.ac.uk/~mgk25/mswish/ut-rtc.html

Thanks. After following more forums and threads from your start point this solved it for me and may help others. Certainly worked in Vista. Put a batch (.bat) file in the Vista Start Folder with these 2 lines in the bat file (just use notepad).

w32tm /resync
exit

If you are in Vista when you create it just double click it and exit to OS X and Voila the clock works fine.

Every time you start Vista of course that bat file is executed automatically. I got 4.7 as an overall performance score in Vista. Pretty damned imrpressive. What a great piece of hardware the iMac is. Considering it must be really a laptop MoBo 4.7 is awesome. I ran Company of Heroes at 1920 * 1200 with no slowdown what so ever.