On Thursday, Acer said they will offer a free upgrade to Windows 8 on some ultrabook models, saying it will refund the upgrade fee being charged by Microsoft on certain Windows 7 PC models purchased by buyers between June 2, 2012 and January 31, 2013.

Acer will refund consumers who purchase the Aspire S3, Aspire S5, Aspire M3 and Aspire M5 ultrabook models between June 2 this year and Jan. 31 next year. Users will have to pay Microsoft for the upgrade, but will then be refunded by Acer via a claim website.

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