If you don't want to spend money buying windows server to manage your network or domain, then you can use Ubuntu server capability using Samba. Installing Samba on Ubuntu is like having a windows server that enables you to manage your windows computer/ clients. So this is much like you are having a windows server on your network and yet you are only using ubuntu with samba installed and act as an active directory.
One way to check if you have a bad hard drive is to use some tools or software for checking hard drive errors. If you have windows OS, you can scan for hard disk error in the system tools -> Disk Defragmenter. This is also useful but there are also software that you can use on checking your hdd errors or bad sectors. I shared a video bellow on checking hard disk failures or bad sectors.
I would like to share with you some tips or ideas on how you can repair your hard disk drive (HDD). Even though your HDD fails or not detected in your PC's BIOS or it process very slowly, there may be some ways on how you can make it work again or how you can recover your important data on it.
I wabt to share a video on how you can setup a web server using FreeNAS. One thing good about freenas is that its free and you can do a lot of file server stuff on freenas. But in this video freenas is setup as a web server and it is fully functional. It can be used as file sharing on the internet and all cool internet sharing services.
If you cannot connect to the internet and have this problem "DNS isn't responding", this is a problem in your isp provider. Try following the solutions on Windows 7 computer or any version of windows you can do similarly.
Applying thermal paste to a processor chip like intel or amd helps for not overheating. It maintains a range of temperature so that it will not overheat. This is also the most commmon cause why your computer begins to freeze or hangs up suddenly. When your computer or laptop begins to process an application very slowly and you noticed when you touch the cpu part, this is one of the reason. So overheating of the cpu or the gpu for the graphics. And applying a thermal paste to it is one solution. So here is a video on how to apply thermal paste to your cpu or gpu unit.
Here is a video on installing or setup a water cooler on intel motherboard. Please be careful in setting up water cooling on your board. Installing water cooling system on any motherboard is very important if you use that one as a server or for gaming purposes where cpu processing is highly recommended. So it is better to install proper water cooler system on your cpu if this is the case.
I will share to you my experiences on why a computer or laptop keeps on freezing or hangs up at certain time or when you process some applications or even when you do nothing. It suddenly hang up and you do not know what is the reason behind it. So here are some of my tips why your computer hang up.