While we do have some suggestions for helping players work around this issue, ultimately we need you to understand that this is a limitation of 32-bit Operating Systems and not actually of WildStar. The main issue here is simply memory limitations inherent in 32-bit Operating Systems. You can read more about that specific Windows based limitation here: http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778%28v=vs.85%29.aspx
In short, 32-bit versions of Windows can’t see or use more than 3.5GB of RAM, including video RAM, even if more than 3.5GB of RAM is installed in the system. This is where it gets a little complex but the short version is that the additional memory can push your total available memory into negative numbers resulting in crashes or simply, "out of memory errors." Some players have resolved this by upgrading to 64-bit operating systems and others have simply removed physical RAM from the system to bring the memory totals closer to values intended for that revision of Windows (32-bit). Obviously removing RAM from your PC is not an ideal solution but I wanted to give you all the information we have found regarding these issues. You can read more about this issue from Microsoft here:http://support.microsoft.com/kb/929605 but the important part is listed below:
"For example, if you have a video card that has 256 MB of onboard memory, that memory must be mapped within the first 4 GB of address space. If 4 GB of system memory is already installed, part of that address space must be reserved by the graphics memory mapping. Graphics memory mapping overwrites a part of the system memory. These conditions reduce the total amount of system memory that is available to the operating system."
Because of this, the solution to your issue is simply to give serious consideration to upgrading your operating system to a 64-bit version of Windows. Until you do this, there really isn't a way around this crash as you are limiting your computers performance by having a 32-bit version of Windows.