Code 652 some time during the day or night my pc locks up and I have to manualy reboot.

Info on fix: -

http://www.pc-library.com/errors/error-code/652-0x28C/

The windows error message 652(error_driver_database_error) is the unrecognized response from the device. What this means is when the computer modem has a problem establishing an Internet connection. This type of error is also the result of phone lines not properly attached to the modem. If the user has a modem of the external type, Windows error 652 occurs because the modem is connected to the incorrect communication (COM) port. This error may also happen because of serial cable entanglement. These are the problems associated with Windows error 652: The modem is unusable and connecting to the Internet is impossible. A frequent loss of local network connection may also be attributed to Windows error 652.Errors on your system may be caused by invalid registry entries and outdated or corrupt drivers. To ensure Windows error 652 will not occur again, the user has to make sure the phone line is attached properly to the modem. If the user has an external modem, the serial cable should be connected to the right communication (COM) port. The user should also check whether the phone lines and modem cables are properly linked to the computer. The modem must be properly installed using the right driver. If the problem persists, the user should contact the modem manufacturer.