Windows 7 is one of the recently released products from Microsoft. As in any complex system, and Windows 7 can be observed errors due to which the computer begins to "freeze".
Viruses
In case of any failure in the operation of the operating system, you first need to check your computer for viruses. Although Windows 7 is much less susceptible to infections than its predecessor, antivirus software should not be neglected.
If you do not have the opportunity to install a full-fledged paid antivirus program in the near future, use a scanner program. The essence of this utility is that it is disposable, i.e. will scan your computer once and identify threats. You cannot delete anything with it. To do this, you can install a trial version of the antivirus.
It is recommended to install more "advanced" programs to protect your computer. For example, Kaspersky gives more guarantees to protect Windows 7 than Nod32. Moreover, there is a free version of "Kaspersky" from "Yandex", which can be used for six months.
Ctrl + Alt + Delete
While the computer is running, the operating system, in addition to "visible" actions, performs a large number of "invisible" ones. Sometimes these "invisible" processes are not important for the operation of the system, but, taking up memory, slow down the work.
The key combination Ctrl + Alt + Delete will open the "Task Manager", which will indicate how many programs and processors are currently running Windows 7. In the "Applications" tab, you can, by clicking the "End task" button, disable unnecessary utilities - this is will significantly increase the speed of work.
Go to the "Processes" tab in the same window and, choosing an unnecessary process, click the "Destroy" button. It will be better if you are helped by a person who understands these issues. You yourself run the risk of disabling the process that is responsible for the operation of the system, than causing a forced reboot.
the Internet
If your Windows 7 computer freezes when you launch your browser and browse the Internet, you should clean the registry and fix the error. For this, the free CCleaner program is suitable, which will automatically save memory from unnecessary information. You can download this utility on the official website.
Clearing memory
Windows may also freeze for the reason that it does not have enough memory, as the hard drives are full. If you enter "My Computer" then under each disk name you can see how much free memory you have. If more than 80% is occupied, then it is worth taking care of their cleaning.
Going to the "Control Panel", select the "Uninstall Programs" section. Next, be guided by the principle of what you really need from the installed one, and what just makes Windows 7 freeze.