Just want to share my experience of having just bought a Sony VAIO laptop:
Shortly after purchasing the laptop I noticed that the date and time was completely off, so changed it. Switched off, back on again and it was wrong. So, checked in the BIOS, changed again, switched off, back on, and date/time all wrong.
So, problem: motherboard battery almost cetainly needs replacing (i.e. I was sold a laptop with a dud or exhausted CMOS battery).
Step 1: contact Sony support via e-mail form. Received no response, not even acknowledgment of enquiry being received.
Step 2: try to register the laptop with Sony in the hopes that this would speed up support response. Unfortunately the auto-form on the sony.co.uk will not accept the model number of my laptop (SVE1511E4E), even though this is printed clearly on the back of the laptop. So, try a different model that is close - result: form will not accept this either.
Step 3: investigate telephoning Sony support. Realise that Sony are running a bandit 0905 premium-rate 'support' number (i.e. don't phone us unless you have an hour to spare and don't mind paying about 20 quid for the privilege). Decide not to continue with call.
Step 4 (slightly exasperated by this point): try filling in e-mail form again, with additional information. On submission of form (not before), am told that e-mail support is 'down for maintenance'.
Step 5: consider returning VAIO laptop and buying from a company who can actually provide support for their customers.
ABSOLUTELY RUBBISH EXPERIENCE. WELL DONE SONY.