import sys
sys.path.append('C:\WINDOWS\WinSxS\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4148_none_5090ab56bcba71c2')
import sys sys.path.append('C:\\WINDOWS\\WinSxS\\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4148_none_5090ab56bcba71c2') onOn each Windows, you can find "MSVCP90.dll"the file MSVCP90.dll in some subdirectory from directory "C:\WINDOWS\WinSxS\" in C:\\WINDOWS\\WinSxS\\
In my case derictory is "x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4148_none_5090ab56bcba71c2", the directory was: x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4148_none_5090ab56bcba71c2.
Go to "C:\WINDOWS\WinSxS\"C:\\WINDOWS\\WinSxS\\ and use windows file seach for "MSVCP90.dll"search to find MSVCP90.dll.