It is important that your grid certificate is working for your analysis. You may also be unable to fully participate in some sections of hands-on exercises (or ATLAS analysis work) which require a valid grid proxy.
CERN provides certificate support for Linux and MacOS and the ATLAS experts are not familiar with the necessary steps for Windows. Therefore, if you are working on a Windows machine, please do one of the following:
If you do not have a grid certificate, you may be able to request one from https://ca.cern.ch/ca/. Make sure you are using Firefox when going to the site. Select the “New Grid User certificate” option and follow the instructions, including providing a passphrase to protect the certificate.
After obtaining your certificate and installing it in your browser, continue through the next section to apply for the ATLAS VO membership. The remainder of the grid certificate instructions are given afterwards.