Author Topic: Unblock CHM and other blocked content  (Read 916 times)

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Unblock CHM and other blocked content
« on: August 25, 2017, 11:43:52 pm »
Attachment Manager Since Windows XP Service Pack 2 (SP2)

Description:


Attachment Manager is a new feature included in Windows XP SP2 and Windows Vista intended to stop users from opening malicious files downloaded from the Internet. It does that by attaching a small piece of additional information called zone information to the files, containing the URL from which the file was downloaded. This additional information tells Windows that those files are potentially dangerous.


How does it affect your files
If you download a file from the Internet, that file will be marked as unsafe until you unblock it. When a file is marked as unsafe, Windows might not allow you to open this file, however the exact behaviour depends on the type of the file. This is somehow confusing and might lead to hard-to-find and obscure problems later on. It is therefore necessary to always unblock any file that you trust to avoid any unnecessary problems.


Downloading a ZIP file from the Internet


If you downloaded a ZIP file from the Internet, it will be marked as unsafe. When you extract the files inside the ZIP file using Windows Explorer, it will mark all those files as unsafe as well. It is therefore very important to 'unblock' the ZIP file before you extract the contents.


How to unblock files downloaded from the Internet or just deemed unsafe by Microft such as CHM, Exe,  Files
You can check if a file is marked as unsafe from the properties screen (Windows Explorer, right-click, choose Properties).

You can check if a file is marked as unsafe from the properties screen

Click on the 'Unblock' button to tell Windows to remove the 'unsafe' marker.
FAT/FAT32 volumes are not affected.
Attachment Manager is unable to mark files that are stored on FAT/FAT32 volumes. Only NTFS volumes are affected.
If you do not have an Unblock on Right Click option.......... then you have to Disable The Attachment Manager by Enabling.


Disabling the Attachment Manager
The Attachment Manager can be disabled,tThe steps to do that are outlined below:





On pressing on the start menu, write Group in the search bar and then select Edit group policy, as shown above.






When the 'Local Group Policy Editor' opens, come down to User Configuration and select Administrative Templates on the botton left hand side.

On the right hand side, double click on the Windows Components section.





Then again on the right hand side, double click on the second option  'Attachment Manager'





Then come down to the third option  right hand side  'Do not preserve zone information in file attachments'





Now right click and select the 'Edit' Option





As you can see above, It is not configured meaning, it is active...........





Select 'Enabled' (Enabled would mean that 'Do not preserve zone information in file attachments' is enabled, which in effect will stop Windows from storing the zone information in file attachments). And then click OK to close the dialog box.





Then to exit the 'Local Group Policy Edtor'  just click on the top right hand side X to exit.
System 1 Specs:

OS:Windows 7 Professional 64Bit
CPU:Intel® Core™2 Quad Processor Q8400, 2.66 GHz, 1333 MHz FSB
System RAM:8GB Ddr2 Ram
Video:ATI Radeon HD 7470 PCI-E Graphics Card 1Gb
Sound:Creative Labs SB0460 X-fi Fatality Sound Blaster

System 2 Specs:

OS:Windows 7 Professional 64Bit
CPU:AMD Intel Quad Core i7 860 @ 2.80GHz Lynnfield 45nm Technology
System RAM:16.0GB Dual-Channel DDR3 @ 664MHz (9-9-9-24)
Video Card:512MB NVIDIA GeForce 310 Graphics
Sound Card:Realtek High Definition Audio

System 3 Specs:

OS:Windows 7 Professional 64Bit
CPU:AMD Essentials E1-2100 Accelerated Processor clock speed : 1.0 GHz
System RAM:Crucial 16GB  DDR3 RAM (1,333 MHz)
Video Card:AMD E1-2100 APU with AMD Radeon™ HD 8210 Graphics
Sound Card:Realtek ALC269Q-VB5-GR