[support] New build - crashes

Hi, after six months away from Drupal just getting back into it. Fresh successful install of 7.9. Added CTools(-7.x-1.0-rc1.tar.gz) and Panels(-7.x3.0-alpha.3.tar.gz) - both configured (activated) and checked okay. Then added Views(-7.x-3.0-rc1.tar.gz), but as soon as I configure/activate Views and Views UI, I get a "HTTP 500 - Internal Server Error", and a blank screen. Are there any error logs that might help me troubleshoot? or a way to de-activate the Views module external to the site management so I can get some idea as to what has happened? Regards Alison