Error with using GIMP 2.8

Hi,
Is anybody here familiar with using GIMP2. 8?
I have been using GIMP 2.6 for a while now, but when I updated to a GIMP 2.8 the error posted below popped-up while I was starting it up for the first time.
It installed to my flash drive without a problem.
What could be wrong with this?

wind.exe – Entry Point Not Fount
The procedure entry point gzdirect could not be located in the dynamic link library zlib1.dll.
OK
