WampServer

I am running the website through wampserver. The configuration are as follows

OS- windows-7 Professional
Memory -4 GB and on average consumption is around 40 % and processor percentage is 4%
Wampserver - 2.4
Apache Version- 2.4.4
PHP-5.4.16
MySQL-5.6.12

The server becomes unresponsive two three times a days, page not opening from Internet and it also not open on local server. After stopping and starting the services it becomes normal, at the time of unresponsive neither memory nor processor uses increases. What may be the problem ?

Have you looked at and applied these WampServer 2.4 fixes?

Doc = [forum.wampserver.com]

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(Windows 10 Pro 64bit) (Wampserver 3.3.4 64bit) Aestan Tray Menu 3.2.5.4
<Apache versions MULTIPE> <PHP versions MULTIPLE> <MySQL Versions MULTIPLE>
<MariaDB versions MULTIPLE> <phpMyAdmin versions MULTIPLE> <MySQL Workbench 8.0.23>
Read The Manuals Apache -- MySQL -- PHP -- phpMyAdmin
Get your Apache/MySQL/mariaDB/PHP ADDONs here from the WAMPServer alternate Repo
-X-X-X- Backup your databases regularly Here is How dont regret it later! Yes even when developing -X-X-X-

I have further checked , on stopping and starting apache server things are becoming normal..what may be the reason ??

You mean that your problem has gone away after updating thing from the Fix document?

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(Windows 10 Pro 64bit) (Wampserver 3.3.4 64bit) Aestan Tray Menu 3.2.5.4
<Apache versions MULTIPE> <PHP versions MULTIPLE> <MySQL Versions MULTIPLE>
<MariaDB versions MULTIPLE> <phpMyAdmin versions MULTIPLE> <MySQL Workbench 8.0.23>
Read The Manuals Apache -- MySQL -- PHP -- phpMyAdmin
Get your Apache/MySQL/mariaDB/PHP ADDONs here from the WAMPServer alternate Repo
-X-X-X- Backup your databases regularly Here is How dont regret it later! Yes even when developing -X-X-X-

No, still i have to restart the only apache module after hang .....for normal behavior.. some problem with apache...