Yes it will, but it will also remove EVERYTHING on the drive; your personal files, settings, programs, even your operating system.
Don't attempt to format your hard drive unless
A) You are prepared to loose everything on the drive AND you have experience installing Windows or another operating system.
B) It is a secondary drive (such as an external hard drive) which has no system files AND you are prepared to loose everything on the drive.
Yes, Surely it will remove everything on hard drive. Formatting a hard drive means to remove everything on hard drive. If you are formatting only a specific drive like C:\ or D:\ then the data in only that drive will be removed.
By formatting the hard drive.
Yes, a virus is capable of crashing your hard drive.
NO. In the absence of anti-virus software that will remove a virus, upgrading will not do the job. Doing a clean install of the full Operating System (OS) after formatting your hard drive is the only solution. The key to a "clean install" is making sure that your method of formatting wiped the hard drive clean with zeros and ones. ----------- There are other solutions actually. I have not resorted to a format to eliminate a virus in a long time. Use any of a number of commercial anti-virus programs to eliminate the virus then run the SFC /scannow command to repair the system files. After everything is clean then you can uograde windows. To get to SFC /scannow you will need to go to start/ run - then type in SFC /scannow. Remember to put a space between SFC and the forward slash.
You can completely clear your external hard drive by formatting it.
If you have erased the hard disk then the Trojan is gone.
Yes.
The ONLY sure way is to remove the hard drive and destroy it completely. Less drastic measures that work for most users would include formatting the hard drive and reinstalling the operating system. Short of that, anything you do will leave traces that can be followed and recovered.
Yes, formatting a computer hard drive will delete the operating system.
If a virus persists on a PC even after formatting it is likely that the virus has been inserted into the boot sector of the hard drive - which is not rewritten when you re-format it. Assuming you are running a Microsoft OS, to fix it, boot using the install CD for the OS and run the first Repair option which will load the Recovery Console from a ramdisk (and doesn't use the hard drive for booting). This requires that your BIOS supports booting from the CD drive. Then run the 'fixboot' command. This is supposed to overwrite the boot sector. You may have to specify the drive letter of which partition to fix.
Yes.
Of course, copy all your programs and files you need from the old hard drive and put it on your new hard drive BEFORE formatting the old hard drive. Formatting your hard drive will mean losing everything and a slim chance of getting it all back.