i have dual OS, windows vista and fedora core 7.i delete the partition of linux using disk management utility under windows vista. but when i reboot my computer, there is a grub promp appear and i don't enter my vista os. if anyone have any solution please help me.

The Answer by ruben_swing :

Insert the Vista Installation DVD and boot from it and at the install now page on the bottom left it says Recover my computer, click on it u will be shown a dialog with a lot of options on it select the option which says command prompt it will open a cmd window. type at the prompt: bootrec /FixMbr after that reboot ur PC and u will have vista working again

what I said when you buy an upgrade cd does it still have all versons of win vista on it just like the install cds

The Answer by Fed-up :

The upgrade CD [actually a DVD] is an install DVD. It contains all versions of Vista.
The key you receive with the DVD determines what version you are entitled to install.
In fact, when you install the upgrade, you usually backup, format and install the version of Vista you have the key to.

Can I use the Vista Upgrade on a Mac, or do I have to get the full version (I'm not asking legally, I'm asking if it's possible without extra effort)? I don't want Vista, but I need it in order to take classes online at my high school.

Also, does the built-in microphone work on Vista?

The Answer by scherzkm :

t should work, but I recommend backing up your bootcamp partition, in case everything goes pear shaped and you will need to restore XP. If you're careful enough, it shouldn't affect your OS X and EFI partitions.
http://kb.parallels.com/entry/31/474/