I have an Acer Aspire 5737Z laptop, with Windows 7 RTM installed. The system is working good and fast (DVD, video, media center, web etc.) apart from random freezes occuring once almost every day. Most of the time I am not even at the computer, it just freezes while I am at work, with uTorrent the only extra process running. Since I got the computer (15 days ago), the hdd (500GB) has been making some strange noises even when the machine is idle...it just seems to read/write something (the led lights too) every 4-5 seconds. I checked the Event Viewer and I got this message 5 times in a row from 3 days ago - The driver detected a controller error on \Device\Harddisk1\DR1. My only hdd is WDC WD5000BEVT-22ZAT0 ATA Device (from Device Manager). I have installed chipset and graphics drivers from Nvidia, latest versions for Windows 7. Could someone help in a matter to determine if the random freezes are connected to this error, and if the hdd/controller/cable is somehow failing? I have A LOT of very important stuff on the drive, please share your advice. I will be doing backups the whole day tomorrow nevertheless.