Can you help me some more info?
1. What OS are you running?
2. Are you able to see Kitprogs in PSoC Programmer? If yes, can you program the devices through programmer? If no, what message does Programmer show?
3. When you say they show-up as Kitprog and Kitprog2 in device manager, under what category do they appear? COM, USB controllers etc.
4. Can you tell us the LED status? For PSoC 4 kit - Status LED and for PSoC 6 kit - LED1 to LED3 near PSoC 5LP?
5. When you uninstall PSoC Creator, can you also delete the PSoC Creator folder in "C:\Program Files (x86)\Cypress\" and delete the registry entries (Open regedit.exe and delete the "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Cypress\PSoC Creator" key entry) and then install PSoC Creator and see if that fixes the issue?
Meenakshi Sundaram R