Visual Studio 2010 SP1 update - missing crtdefs.h

Hello,
I installed the “critical” SP1 for Visual studio 2010 and now my CUDA programs won’t compile:

1>  C:\Users\omriz\Dropbox\Documents\Cuda_Thesis\code\fast_2010 - Copy\fast_2010>"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.1\bin\nvcc.exe" -gencode=arch=compute_13,code=\"sm_13,compute_13\" --use-local-env --cl-version 2010 -ccbin "c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\x86_amd64"  -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.1\include"    --keep-dir "x64\Release" -maxrregcount=0  --machine 64 --compile     -DUSE_FLOAT -Xcompiler "/EHsc /nologo /Ox /Zi  /MD " -o "x64\Release\fastunrefl_PTD.cu.obj" "C:\Users\omriz\Dropbox\Documents\Cuda_Thesis\code\fast_2010 - Copy\source\fastunrefl_PTD.cu" 
1>  fastunrefl_PTD.cu
1>c:\program files\nvidia gpu computing toolkit\cuda\v4.1\include\host_config.h(144): fatal error C1083: Cannot open include file: 'crtdefs.h': No such file or directory
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\BuildCustomizations\CUDA 4.1.targets(361,9): error MSB3721: The command ""C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.1\bin\nvcc.exe" -gencode=arch=compute_13,code=\"sm_13,compute_13\" --use-local-env --cl-version 2010 -ccbin "c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\x86_amd64"  -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.1\include"    --keep-dir "x64\Release" -maxrregcount=0  --machine 64 --compile     -DUSE_FLOAT -Xcompiler "/EHsc /nologo /Ox /Zi  /MD " -o "x64\Release\fastunrefl_PTD.cu.obj" "C:\Users\omriz\Dropbox\Documents\Cuda_Thesis\code\fast_2010 - Copy\source\fastunrefl_PTD.cu"" exited with code 2.
1>

Has anyone encountered this error? Any advice on how to overcome it?
I can’t find crtdefs.h anywhere after the update…