Chef-client installation issue

Hi guys,
Please help if anyone of you have experienced issue as follow:
chef-client installation fails during bootstrap process due to not being able to create/edit environment variables %PATH% and %SSL_CERT_FILE%.
If I create/edit them manually before bootstrap process, everything works.
Bootstrapping is being done under Administrator account with all privileges
OS: Wndows 2008 R2 SP1.
Regards, Taras.