For those who have bought TomTom GO 510 units from woot, don't give up hope. My unit had crashing and rebooting issues and now they are all gone.\n\nI'll try and summarize solutions in one post so bear with me.\n\nBefore you do anything, run TomTom Home on your computer and backup your device.\nIf you're technical, you can go into the disk and save the maps to the computer.\n\nIf the device is charged and doesn't start-up, try resetting it:\n[url]http://www.tomtom.com/support/solution.php?GID=1&PID=234&SID=0&CID=216&Language=4&FID=7134[/url]\n\nIf the settings don't get saved when you power-on the device, use the clear flash tool:\n[url]http://www.tomtom.com/support/index.php?Language=4&query=clear+flash+tool&FID=6211[/url]\n\nIf the unit freezes up and reboots once in a while, try backing up, reformatting the SD card, and then restoring everything.\nPC users can right-click on the drive-letter (eg. F: or G: ) and format the device. Name it TOMTOM DISK, and then restore from TomTom Home\nMac OS X users can use the disk-utility in the Applications > Utilities folder to erase the TOMTOM DISK. Make sure you format it as an MS-DOS format and NOT MacOS extended or anyting else.\n\nHope that helps!