How can I tell if I have the 128 bit version of Service Pack 3 installed?

A. The easiest way to tell this is to examine the secure channel dynamic link library (SCHANNEL.DLL):

1. Start Explorer (Win + E or Start - Programs - Explorer)
2. Move to %systemRoot%/system32 (where %systemRoot is the windows NT directory, e.g. d:\winnt)
3. Right click on Schannel.dll and select properties
4. Click the Version tab. The description will be one of the following:
   PCT / SSL Security Provider (U.S. and Canada for the 128 bit version.) if you have the 128 bit version
   or
   PCT / SSL Security Provider (Export Version) if you have the non-128 bit version
5. Click OK when finished
6. Close Explorer