Although the Map & Data Library is physically closed, we are still available remotely and happy to help. We can conduct consultations using online teleconferencing software. Please feel free to contact us at mdl@library.utoronto.ca or use our help form. We have a number of tutorials available, are still supplying software licenses, and have compiled a list of resources for working with COVID-19 data.

Please note that our computer lab is also accessible for use through remote access. See this link for more information.

COVID-19: Updates on library services and operations

Deauthorizing ArcGIS

If you need to uninstall and reinstall your authorized copy of ArcGIS (for example, if you are reformatting your hard drive or switching to a new computer or you have entered your eva code in once and it did not authorize) please follow these instructions before uninstalling the software.

  1. Open up ArcGIS Administrator (located in the ArcGIS program group in your Start Menu).
  2. In the left-hand pane, click the Support Operations folder, and the Deauthorize button.
  3. Follow the instructions to remove the core product and any selected extensions from your machine. https://desktop.arcgis.com/en/desktop/latest/get-started/administering-desktop/authorizing-arcgis-single-use-products-and-features.htm\
  4. Uninstall ArcGIS for Desktop (Control Panel > Programs and Features).
  5. Reinstall ArcGIS for Desktop.
  6. Authorize software.
Technique: 
Utilities: