proxy server is not responding windows 8

Solution 1:
If you are not using the Proxy server then I suggest you to disable proxy settings. Follow these steps
Under "Tools" in the browser tool bar select "Internet Options". 
In the "Internet Options" window that pops up, click the "Connections" tab at the top.
Click "LAN Settings" near the bottom of the "Connections" section. 
If the "Proxy server" checkbox is marked with a check, click it to deselect/uncheck it.
Click "Ok" to close the "Local Area Network (LAN) Settings" window. 
Click "Ok" to close the "Internet Options" window.


Solution 2:


1. Upgrade to a newer version of Internet Explorer.

2. Reset Internet Explorer

I would suggest you to perform Internet Explorer Optimization on your computer.
Go to run and type "inetcpl.cpl" then you will see internet properties then go to "advanced" tab and click on Reset.
it will give you prompt that really you want to perform this action Click Yes then your browser will be reset.

Disclaimer: The Reset Internet Explorer Settings feature might reset security settings or privacy settings that you added to the list of Trusted Sites.

3. Check your Internet connection

4. Disable add-on

While browser add-on can enhance your online experience, they can occasionally interfere or conflict with other software on your computer.

If disabling  add-ons  solves the  problem, you  might want  to use Manage  add-ons . To disable  all add-ons  which is not required.

How to easily enter safe mode in windows 8

What About F8 and SHIFT+F8?

Press and hold the Shift button and press F8 key simultaneously, this will sometimes boot you into the new advanced “recovery mode”,  where you can choose to see advanced repair options.

when your PC reboots you will be able to boot into Safe Mode from the familiar looking Advanced Boot Options screen.

Safe Mode with "MSCONFIG"

Select Run box and type MSCONFIG then you will see  SYSTEM CONFIGURATION UTILITY

Switch over to the boot tab, and click on the Safe Boot check box.

then click on apply and restart your PC.

How to go safe mode with command prompt in windows 8

Go to Start Menu tiles and type CMD you will see this

then it will prompt you to Click on YES

Click to input Bcdedit /set {bootmgr} displaybootmenu yes,when completed press the Enter key on the keyboard. If you need to cancel the prompt to enter options at startup, simply change Yes to No. 

Once completed, please restart your computer and press F8

then you are able to go Safe Mode in Windows 8.

Internet Explorer open with a blank page instead of web site

Go to "Start - "Run" - and register the following dll by using regsvr32 command:
 
 
      regsvr32 scrrun.dll‏ 

      regsvr32 msxml.dll‏ 

      regsvr32 mshtml.dll‏ 

      regsvr32 shdocvw.dll‏ 

      regsvr32 browseui.dll 

      regsvr32 msjava.dll‏ 
 
      regsvr32 urlmon.dll‏

      regsvr32 actxprxy.dll 
 
Note: Please try first to register the urlmon.dll and actxprxy.dll and restart Internet Explorer.
 

2. Restart the Internet Explorer.