One of the thing windows is infamous for , is system handling. Everyone has had a run in with the Antarctic PC ( A frozen system) one time, or another. The problem is that this is one of the most complicated problems to solve. Almost anything can make a system stop responding- faulty hardware, software, drivers, etc., and with the sheer amount of hardware and software loaded on PCs today, it virtually impossible to prevent. However, if this happens too often, then you know you have a problem at hand.

The first thing you need to make sure of is that all devices are installed properly, with up-to-date drivers. Open the system Properties Device manager , and check the yellow exclamatory marks. These signify improperly installed devices. Reinstall the drivers for that device, or just remove it and check if the system has stopped hanging.

Check your system for a virus. Make sure that your anti-virus definitions are up to date, and use the through scan option to scan your system regularly.

Certain badly written programs can be memory hogs, and refuse to release the memory they had used. This leads to more and more memory being used, until the system is unstable and crashes. Update your Os and with all the Latest patches. Also, upgrade all applications and get all the available patches.