Microsoft has unveiled its "Windows 7 Upgrade Option Program" that allows free or nearly-free upgrades to Windows 7 for people who purchase a new Vista PC between June 26, 2009, and Jan. 31, 2010.
The customers who buy windows vista equipped PCs during above mentioned period will be able to upgrade to windows 7. The PCs with Windows Vista Home Premium, Business or Ultimate versions of vista will get an upgrade to Windows 7 Home Premium, Professional or Ultimate when Microsoft officially introduces the new operating system. The soonest date to receive this upgrade disc is Oct. 22, the retail availability date for Windows 7. It may be weeks later, however, before many customers see those discs.
The program is a repeat of one launched in 2006 where Microsoft offered discounts for upgrading to windows vista for new windows XP PCs during oct06 to mar 07.
Microsoft has listed several computer makers, including Acer, Asus, Dell, Fujitsu, Lenovo, Samsung, Sony and Toshiba, that sell laptops that qualify for a free or discounted Windows 7 upgrade.
The FAQ regarding this program can be found here.

Now first of all what is this conficker?
Conficker is a worm that is specifically targeted at windows users(another reason why you should switch to Linux). It spreads by exploiting a vulnerability in the network stack implementation of Windows operating systems ranging from XP to newly launched Windows 7 beta. It is also known as downup and downadup. It so good(or bad) that leading Anti virus companies have formed teams to see if they can find some cure for it.

What it does?
Researchers are still working to find all its "features" but here are few that are most important:

• Disables access to all anti virus sites.
• Disables windows update
• causes congestion is LANs
• Disables Microsoft services like BITS and error reporting
• researches have just recently found that it also installs fake anti virus software for just $50.

How it propagates?
After infecting a PC using vulnerability mentioned above it attaches itself to system start up. Then the worm (one of its variant to be specific) generates a list of 250 domain names across five top level domain names and tries to connect with those hosts to check for any available "Updates"(cool,innit?). Its different variants use different number of hosts and tlds.
Some of its variants attach themselves with removable media so as to infect new machines.The worm is spreading so fast that right now there are around 10 million computers infected with it.

How to find if you are infected?
Just check if your PC shows any of above symptoms. For example if you can connect to anti virus sites using proxies but are unable to do so directly then you are infected.

How to remove?
The worm disables system restore so it is of no use. It also terminates anti virus related processes and hence that gets eliminated as well. Use updated versions of Bitdefender of McAfee to remove this worm. Also download and install the emergency patch issued by Microsoft from here. Another suggestion is to disable AutoRun option. Another(really important) suggestion is to turn off the Administrative shares. The worm can remotely execute on your PC if these shares are enabled.

PS: Microsoft is offering $250,000 if you can only find out who released this worm. Well..........

PPS: If you want security products for free then check this out.