Skypeportable 6.2 not running on older machine

Upgraded from skype 4.something to 6.2 (today) as the older skype versions don't seem to work/login anymore. (maybe a chinese firewall thing, i live there?)
Anyway on my newer laptop 6.2 works fine, on my older 11 years old lenovo i get: Failed to get proc address for GetLogicalProcessorInformation (Kernel32.dll)

on startup, says it's a fatal error. end of skype on my desktop?