# Where to find required license keys / serial numbers for installation of GenomeStudio 2011.1
License Keys for GenomeStudio 2011.1 Genotyping, Methylation and Gene Expression Modules are required for installation of the software. The Installer requires entry of specific license keys under the column "Serial Number" when selecting and installing the different GenomeStudio Modules.
The license keys can be found in a text file included in GenomeStudio 2011.1 Software Installer package, which can be downloaded from the [GenomeStudio Downloads](https://emea.support.illumina.com/array/array_software/genomestudio/downloads.html) website page.
The contents of the text file are as follows.
* As of July 2016, unique GenomeStudio Software 2011.1 license keys have been discontinued. The following modules can be registered with the provided license keys at no charge.
* Genotyping 4788-0412-2610-5640
* Methylation 8745-5160-7273-7024
* Gene Expression 6776-1785-1458-5481
**Note:** Include the dashes when entering the license keys.
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| *For any feedback or questions regarding this article (Illumina Knowledge Article #3536), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000003536%20-%20Microarray%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |
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