Hi Marcos1,

>Make sure all the updates are installed in the PC, when the screens goes black does it gives an error or code? or it just the hibernate problem?

> Go to Control Panel> Power Options> Change Plan Settings> and change all the options On Battery and Plugged In to Never> you can also try going to Change advance power settings > and change settings under Sleep tab.

Slow computer> Disable unnecessary startup programs in your task manager on the startup tab:

Background programs

One of the most common reasons for a slow computer are programs running in thebackground. Remove or disable any TSRs and startup programs that automatically start each time the computer boots.

Tip: To see what programs are running in the background and how much memory and CPU they are using, open Task Manager. If you are running Windows 7 or higher, run Resmon to get a better understanding of how your computer is being used.

If you have an antivirus scanner on the computer, spyware protection program, or another security utility, make sure it is not scanning your computer in the background. If a scan is in progress, it can decrease the overall performance of your computer. If this is the case, allow the scan to complete and the computer's performance should improve afterwards.

Bad, corrupted or fragmented hard drive

• Run ScanDisk, chkdsk, or something equivalent to verify there is nothing physically wrong with the computer's hard drive.
• Run Defrag to help ensure that data is arranged in the best possible order.
• Use other software tools to test the hard drive for any errors by looking at theSMART of the drive.

Update Windows

• Make sure you have all the latest Windows updates installed on the computer.
• If you are on the Internet when your computer is slow,make sure all browser plugins are up-to-date. You can also try disabling browser plug-ins to see if one of them is causing the slowness.

Update your drivers

Make sure you have the latest drivers for your computer hardware, especially the latest video drivers. Having out-of-date drivers can cause an assortment of issues, including slow performance.

I don’t know exactly what internet issues you have but you can try these steps:  

Winsock Reset in Windows 8

1. Move the mouse to the upper right-hand corner of the screen to make the vertical menu bar appear. Click Search.
    
2. Type “cmd” in the search bar and hit the Enter key on your keyboard.
    
   
    
3. Right-click on cmd in the search results for Programs, and select Run as administrator. Depending on your computer settings, you may be asked to provide an administrator password before you can continue.
    
4. A black box with a flashing cursor will open; this is the Command Prompt. Type “netsh winsock reset” and then hit the Enter key on your keyboard.

   
    

5. Wait for the Command Prompt to run through the reset. Once it’s complete, you’ll see the message “Winsock reset completed successfully”.
    
6. Restart your computer to finish.

I hope this help you.