My Dell Inspiron 1545 (brand new at Christmas 2009) came with Windows 7. The main issue I have is the "Not Responding" errors, especially when I try and access my Control Panel. It's almost a daily thing. Recently it's been happening with Windows Media player, but I've noticed in this case, it's when my computer memory is being exhausted by other programmes.
I use Avast as my running anti-virus software, and do regular scans with Threatfire, Iorbit Security 360 and Malwarebytes. I maintain my system at least weekly (registry and defrag, etc.)to free up memory using Advanced System Care. I also use ZoneAlarm for my firewall. I keep everything updated. I can't help but think there's either a hardware error with this model laptop, or software error with Windows 7.
My reason for posting this here (and after I got CNET's newsletter), is that I've also experienced complete system freezes when my laptop has been left running. Perhaps only 3 or 4 times over the last few months, but enough to think I might have a virus! However, each time, all scans run clear.
I've just tried to check what power options I have enabled, and guess what? My Control Panel is not reponding!! Very frustrating! I don't think I have the sleep option enabled, but I will check again, it might take a reboot though.
Any help would be fab! Let me know if there's any more info you need that might make the puzzle easier!