Microsoft's European online store was apparently overwhelmed by demand
... hasn't said how many discounted Windows 7 pre-orders it is willing to offer either in total, or in any particular region.
In Britain, the Home Premium version is selling for 49.99 British pounds ($82.10), while Professional edition is priced at 99.99 pounds ($164.21).
... selling the full boxed version (which does not require a prior Windows installation) at the upgrade price.
Windows 7 pre-orders big in Europe | Beyond Binary - CNET News