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If your OS is installed on that drive yes the OS will be deleted but if your OS is on another hdd then the OS wont be deleted unless you format that other drive.
if drive C: has your OS and everything else on it and you format that it will all removed nothing will be left behind.
But say you had Drive I: with your OS on it and drive C: with all other data on it and your formatted drive c you would not remove the OS unless you formatted drive I:
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Does formatting the hard drive delete the operating system?
Yes.
Do you have to reformat when installing an operating system?
No, there is no requirement of reformatting when installing an operating system as you can install more than one operating system on a samePC. So there is no requirement of formatting the older one, even if you are installing a single new operating system only. Then also there is no requirement of reformatting again, formatting decreases the life of PC. ANSWER: Formatting does not decrease the life of your PC. The statement above is correct in that it is not necessary to format before installing an operating system. However, if you are doing a fresh install, formatting gives you a "clean slate" to install the new operating system. Attain the older one, even if you are installing a single new operating system only , then also there is no requirement of reformatting again, formatting decreases the life of PC. GOOD ANSWER: You do not reformat a PC you reformat a Hard Drive Disk. Whether or not you need to reformat your HDD depends on the operating system you wish to install. Some operating systems require different formats like NTFS or FAT32 so sometimes you need to reformat. You can also have more then one operating system on your HDD but to do this you must create a partition. A partition is a reserved area on the HDD which you can dedicate to different things depending on your needs. Generally, when you are installing an operating system you will have to reformat your HDD or create a partition for the operating system to run on. It does not decrease the life of your PC but sometimes during the reformatting process a few megabites will be lost... nothing serious. Most OSes require one partition to be formatted, but that is why you can create multiple partitions.
How do you remove an operating system?
Most operating systems can only be removed by formatting the hard drive, and then installing the operating system that you desire. The drawback to this is that you will lose everything that is on that partition of the hard drive. Example : if you have a computer with Windows Vista but you want to put Windows XP on the computer you have to wipe (format) the hard drive in order to load Windows XP. This means saving all your documents to a CD or another hard drive or another partition. If you want to upgrade to a newer operating system then this can be done without losing your information, but some programs may need to be reloaded. Hope this helps. ----
Can you install an operating system on a USB Flash drive?
There is no reason you cannot load an operating system on a flash drive. However, getting the computer to recognize the flash drive and boot from it could be an issue.
What is the main functions of an operating system?
The operating system, basically, allows a user to actually use the computer. Without an operating system, it would be like trying to drive a car that did not have an engine!
