I bought this laptop Compaq CQ40 recently an year ago. This laptop unfortunately does not allow to install windows XP operating system, It allows windows 7, 8, 10 or vista. I have installed windows 7 ultimate. The laptop always hangs when I open google chrome browser and its very slow to operate. I have uninstalled and then reinstalled google chrome but still the problem persists. When I connect to internet the browser crashes many times and an a blue screen is displayed which again restarts my operating system. I have installed antivirus programs but still the browser crashes many times and a blue screen is displayed. The most annoying part is the laptop gives me unusual sound of the cooling fan rotating at the backside of the laptop. Always the laptop has heating problem and the battery is also not good for withstanding even 30 minutes of operation. After using just for 3 months I had screen and display flickering problems and I have to replace my screen and the warranty part service was also not satisfactory as I was charged by the service center being it is not covered under warranty. After being priced at rs 32000 this laptop is not cash worthy and I would not recommend as it is not reliable.