The same key can be used to activate Windows 7 on a reinstall?

Last year, I bought an Acer computer and it get very slow recently, the computer was shipped with Windows 7 Home Premium x 64, if I format the hard drive and reinstall Windows 7 Home Premium x 64 can use the product key that was used originally on activate Windows or I have to buy a new product key?

1. after your first computer runing formatting
2.Yes, you used this product key has been used originally on activate windows.
3. no need to buy a new product key.

Tags: Windows

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