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How much HDD space is required for Windows Vista with 15GB free?

  1. 10GB

  2. 15GB

  3. 20GB

  4. 25GB

The correct answer is: 20GB

It is important to understand the difference between the total amount of HDD space needed for Windows Vista and the amount of space that should be free. In this case, Windows Vista requires at least 15GB of free space to run efficiently, but the total HDD space required for the operating system is actually 20GB. This means that if you only have 15GB of free space, you will not have enough room for the operating system and it may not function properly. Also, it is important to note that extra space may be needed for updates, programs, and personal files, so having more than the minimum required amount of free space is always a good idea. Option A is incorrect because it states a total HDD space of 10GB, which is not enough for Windows Vista to run. Option B is incorrect because it claims that 15GB of free space is enough, when it is actually the minimum requirement for the operating system. Option D is incorrect because it suggests that 25GB of free space is needed, which is more than the actual total space required for Windows Vista. Option C is the correct answer because it accurately states the total HDD space required for the operating system, which is 20GB.