Knowledgebase: > Installing ZBrush 2018.1
Computers without a C drive
Posted by Matthew Yetter, Last modified by Matthew Yetter on 06 March 2019 08:14 AM
ZBrush requires that your computer have a C drive.  This is for several reasons, including the fact that GoZBrush uses the C:\Users\Public\Pixologic folder (or its equivalent path name, depending on OS version).  Without a C drive, GoZBrush would not be able to function.
If your computer does not have a C drive for whatever reason you will need to remedy this before you can install ZBrush 4 on the computer.  One method to do this is by disconnecting all other drives and then reinstalling the operating system.  There are less labor intensive options, however.  
The best of the other options would be to purchase an external USB drive, Firewire drive (better) or S-ATA drive (best).  Exactly which you can use will depend on the available ports on your computer case.  Once you have attached the drive you can remap it to be designated as the C drive.  You will then be able to install ZBrush 4 successfully.
The advantage of this option is that it will not affect your existing operating system or programs in any way.  You won't need to reinstall anything and will even get additional disk space out of the deal.
Alternate options will depend upon your level of computer savvy.  For example you could:
  • Install a new internal drive and map it to C
  • Use a USB flash drive.  The limitation of this is that you won't have a huge amount of free space for files.  These can also be difficult to remap to be recognized as C.
  • Depending on your current hard drive configuration you might be able to redesignate one of your existing drives as C.  Doing this will affect anything that uses a path to that drive, such as if you have programs installed on it.  But if it's possible to do this you won't need to install any new hardware at all.  Also, after you have installed ZBrush you can change the drive back to its original letter so that any programs already installed on it will continue to run.
  • The most difficult option is of course to unplug all drives other than your operating system's drive, then reinstall your operating system.  The new installation will then automatically designate the system drive as C.  After installing the OS you can attach the other drives, which will be given higher letter designations.
Please note that some of these options are extremely technical.  If you are not totally comfortable with digging around inside your computer it is highly recommended that you simply add an external drive.  Pixologic can accept no liability for damages or data loss incurred by using the alternate options listed above.