The Standard version is free for 10 hours with discounts on the other Pro Editions.
Decent tool to test and monitor your Hard Drives over the long term. V5.5 also supports SSDs.
Get it now and install within two weeks. If you lose your installer
or have to re-install after the two week period, you won't be able to.
Thanks to nicksman:
If you need to install after the promo period, change the date for your PC to within the promotion period (e.g. today's date) and it will install.
Edit : They've given us another day, so keep going!