Yes. EVERY version of Windows needs anti-virus software, unless you will NEVER connect it to any other network. Or ever plug in a USB flash drive. Or load software from a CD.
Absolutely yes.
yes we need to install antivirus apart from windows defender
Windows Vista has Windows Calender Hi, I'm looking for this too, Calendar Creator Plus for Windows Vista. Did you ever find it or an equivalent?
No, it's compatible with Windows XP, or Vista/Vista64.
The game is already included in most editions of Windows Vista; there is no need to copy it.
Windows Vista can already run most XP applications, with no need for any additional software.
There is no rollback way to do it. You would need to reinstall XP fresh over the Vista install. Why do you want to do that anyway, is Vista not working for you?
Any type of Flash drive can be used in Windows Vista.
No.
Windows media center is available with Windows Operating systems - Vista, Windows XP Media Center Edition, and all editions of Windows 7 except for Home and Starter. If its a Vista OS may be you can call it a vista media center, so you need your computer to have Windows Vista OS.
DirectX 9 is included with Windows Vista.
Windows Vista likely doesn't include drivers for your printer. You will need to download them from the manufacturer's website.