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LICENSE: Renewing a single user license

Information in this knowledgebase article applies to:

  • All Keil products, registered with a Single User ( Node-locked-) License 


I'm using a Single User License, which has expired. 

Now I have renewed my license through a distributor and have gotten a new PSN. 

But when I register a new version on my PC with this new Product Serial Number (PSN), I get an error code 1773 from your website. 

How can I resolve this issue?


The procedure to renew a single user license and to register with a renewed PSN license code is described as follows:

  1. Contact the local distributor to renew the expired Single User License.
  2. A new PSN with the extended support period is generated by the distributor. The expired PSN is deactivated and cannot be used anymore.
  3. Follow the link to uninstall all license ID codes (LIC) that were registered by the old expired PSN from your PCs.
  4. Use the new PSN generated by distributor and follow this link to apply for new LICs on your PCs.

Note that in most cases the reason you get the error code 1773 when registering with the new PSN is due to that the old LICs generated by the old PSN is not uninstalled by following the step 3 above. 


Last Reviewed: Thursday, October 29, 2020

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