Finally, the replacement battery (VGP-BPS2C) for my Vaio VGN-C1S/H arrived (8 month after I reported the defect).
Sony advertises the laptop with full 2 year guarantee; however, the guarantee does not cover consumable material which, in Sony's option, includes rechargeable batteries (as one learns from the guarantee statement inside the package; the Austria Sony website nevertheless has different terms and acknowledges guarantee for the rechargeable battery). Only within the first six month after purchase, the manufacturer is assumed to have supplied a product with manufacturing defects, the onus of proof reverses afterwards. Sony declined to replace the battery under warranty.
Thanks to Verein für Konsumenteninformation (VKI) for intervening successfully!
Some laptop do not enable VMX (VT, Vanderpool, hardware virtualization support) in their BIOS. An example is my Sony Vaio VGN-C1S.
Here is a forum posting with a detailed story with the progress on reverse-engineering VMX support for Phoenix/Sony BIOS.
Got back my Sony Vaio VGN-C1S - unrepaired; Sony declines to replace
defect rechargeable battaries within warranty. They arbitrarily limit
warranty to 6 month for battaries.
The company denies to comment on their interpretation of warranty terms. This sucks!