I ordered a Rs 1999 upgrade today, got the upgrade key in email, downloaded the ISO and burned it on a DVD but am yet to install it. Can I postpone the installation of this Windows 8 Pro upgrade now for say next 6-9 months? Will my upgrade key work for activation 6-9 months from now? I'm looking for a firm answer but FAQs are saying this discounted upgrade can be ordered till so and so date but no one is talking about any deadline for installation and activation of upgrade.I ordered to just take the advantage of the ongoing discount. I'd like to upgrade eventually but can't do it right now because some softwares that I use for stock trading are not available for Windows 8 yet. Also, I'm waiting for Office 2013 launch before doing the upgrade.