I do not think Win 8 driver released yet, see
and recent - http://www.cypress.com/?rID=56745
Try posting a tech case at www.cypress.com and ask for the schedule of Win 8 driver
“Create a Case”
Would you like to have a try with below workaround:
Can you provide more info about the failure with your Win8 machine?
There is another thread talking about this, http://www.cypress.com/?app=forum&id=2232&rID=74548
and seems the workaround is same. I have been received multiple success feedback, so, Would you please give it more try?
Problem with MinIprog3 and Programmer drivers is resolved with Programmer 3.19.1.
If you have Windows 8.1, then same problem may occur in this as well. Solution for this problem is available at link http://www.cypress.com/?app=forum&id=2492&rID=89646. In a tech support case, Cypress support person told me that they are going to fix the problem of drivers with Windows 8.1 in upcoming version of PSoC Programmer.