Lost serial

[CAYESA]

Hello:
I'm an ITS enginer and one user gived me a laptop with windows XP on it. I need to upgrade it to W7. This laptop have a license installed of atlas.ti V6 and the problem is I don't know the serial number because the user lost it. In my organization we have teens of atlas.ti licenses and we can't know wich one is installed on it using the information we have.

Can I extract serial number from computer? Can I install W7 over WXP maintaining the atlas.ti licensed?

Thanks a lot

[admin]

Please write to licenses@support.atlasti.com.