How can hidden directory using ASCII codes.

You have to follow  following steps.
Step1-->  Rename directory using ASCII codes (code of black space)
Step2?  Change folder icon using blank icon
Step3?  Enable option of Don’t show hidden files, folders or Drives (On View Tab) using  folder option on control panel.

Example
Step1--> Create a directory whatever place you can
Step2--> Click right mouse on that directory and select rename option
Step3--> Rename folder using press and hold Alt key(Alter Key) type 255 or 0160  from the numeric keypad.
Step4--> Press enter. Then folder name may disappear
Step5--> Change the folder icon with blank icon

Note;
If you want to access invisible directory press "Ctrl+A" together on your keyboard where you hidden directory then invisible folder will highlight

Track emailed IP address

How do we track IP address of an email sender 

When we sending and receiving an email message we send and receive more than just the massage. The email comes with headers that carry important information. Then we can understand that mail arrival location. Then we can guess country of origin etc...  For that, We should need to find the IP address of the sender. This will help you to understand said situation.

Gmail
1. Log into your Gmail account with your username and password.
2. Open a received mail.
3. Click Arrow head parallel to from address to “show originals”
4. Then will open a new pages with data
5. Find “Received: from”
6. You can find IP address font of “Received: from”
7. That is be the IP address of the sender
8. If you find more than one Received: from patterns, select the last one
5. Track the IP address of the sender

Yahoo Mail
1. Log into your Yahoo! mail with your username and password.
2. Open or select a received mail.
4. Click on the Gear icon on the top of mail
5. Find “Received: from”
6. You can find IP address font of “Received: from”
7. That is be the IP address of the sender

Hotmail
1. Log into your Hotmail account with your username and password.
2. Open a received mail.
3. Click Arrow head parallel to from address to “View massage source”
4. Then will open a new page with data
5. Find “Received: from”
6. You can find IP address font of “Received: from”
7. That is be the IP address of the sender
8. Track the IP address of the sender

Administrative Sharing on a Windows

Enable Administrative Sharing on a Windows Workgroup computer

සාමාන්‍යයෙන් Windows Operating System එකක් computer එකකට install කලාට පසු එම පරිගණකය තුල තියෙන සියලුම partition share නොකර තිබියදීත් එම පරිගණකයේ  Administrator ට password දන්නවා නම් network එකක් හරහා   එම පරිගණකයේ සියලුම  partition වලට ඇතුලත් වෙන්න පුලුවන්. මේකට අපි  කියනවා  administrative   Sharing  කියලා.  ආ.... කියන්න බැරි උනා මේ sharing සාමාන්‍ය ක්‍රමයට sharing  brows කලාට පෙන්නන්නේ නැහැ. අපට අපේ computer එෙක්  administrative   Sharing බලන්න පුලුවන් පහත ආකාරයට.

Right click "MyComputer" -> "Manage" -> Select "Shared Folders" on the left -> Go to "Shares".

මේ ක්‍රමයේදී  ෙවනත් පරිගණකයක සිට අපට
\\ip Addres\C:$  (or  \\MachineName\C$)  ලෙස පරිගණකයේ C: Partition එකට ඇතුලු වෙන්න පුලුවන්.
D: partition එකට නම් \\ip Addres\D:$  (or  \\MachineName\D$)  ඔන්න ඔය වගේ.
මේ ටික විතරක් නෙමේ  පහත අයුරිනුත්  පුලුවන් .

C:\WINDOWS: වලට අැතුලු ෙවන්න \\ip Addres\ADMIN$
 හා   Printer sharing: බලන්නත්  \\ip Addres\print$ මෙලස පුලුවන්.

නමුත් සමහර විට මෙලෙස ඇතුල් වෙන්න නොහැකි අවස්ථා එන්න පුලුවන් ඒ වගේ අවස්ථාවල  කරන්න  ඕන  පොඩි විසදුමක් මේ. අනෙක් කාරණය තමා මේ වගේ ගැටලු වලදි පරිගණක දැනුම ඇති අය ලබාදෙන විසදුම් විවිධයි.

1. Open Run dialog box and type “regedit” to Open Registry

2.  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

3. On the right-hand side, add a new 32-bit DWORD value (32bit or 64bit, depend on OS version) and name it LocalAccountTokenFilterPolicy  and set the value to 1.
**To remove this you can set the value to 0 or just delete the key.

4. Restart computer and check the administrative sharing.

විශේෂ:
** හැබැයි Windows Active Directory Domain එකකට  සම්බන්ධ කරපු විගස මේ තත්වය වෙනස් වෙනවා ඒ වගේ වෙලාවට එම පරිගණකයේ සියලු බලතල Active Directory Domain ට ලැබෙනවා.

** If you disable "File and print sharing from all computers," any PCs running windows won't be able to log into the domain.

Disable Administrative Sharing on a Windows Workgroup computer

ඉහත මම ලියපු කාරණය වගේම තමා ඒකෙ අනික් පැත්ත .   පරිගණකයේ  Administrator password දන්න සමහරෙක් කරදරයක් වෙන්න පුලුවන්. ඒවගේ අවස්ථාවල කොහොමද මේ  sharing නවත්ව ගන්නේ. මෙන්න මේ ටික කරලා බලන්න.

1. HKEY_LOCAL_MACHINE Key: SYSTEM\CurrentControlSet\Services\LanManServer\Parameters Name: AutoShareServer Data Type: REG_DWORD Value: 0
**If you can't find the value in the registry under the exact location (i.e. it does not exist) - please right click in the right pane of the window and create it.

2. reboot is necessary for this to take effect.
Note:If you want the administrative shares to be re-created, you can change the value back to 1.

There are a few concerns to keep in mind:

**Shares with a $ are hidden shares and thus not visible when requesting the share list of a device.
**The Home editions do not have the administrative shares enabled. Many third-party firewalls will disable the administrative shares for security reasons. If you have file sharing turned off, this won't work.
**Admin sharing shouldn't work when we disable files and printer sharing

Read More:
Microsoft 
Other Site

How can I fix it? "BOOTMGR is compressed" on Windows 7

Follow these steps to solve this;
Step1>Insert Microsoft Windows Vista/Win7 Installation Disc. and Press any key when it says "Press any key to boot from CD".

Step2> After that you should see "Windows is loading files..." KEEP pressing F8 while the progress bar loads.....

Step3>Let go until you reach "Advanced boot information" where you should see Safe Mode, Safe Mode with Networking, Last Good known configuration etc...., just select Safe Mode with Command Prompt and press Enter.

Step4>Wait for the files to load and there should be "Safe Mode" on 4 corners of your monitor.
Just be patient and wait. A windows would soon pop up and says "Install Windows". click next.

Step5>Now at the bottom of this window, you should see "Repair your computer ". Click on it,
There are several options available here.

Step6>For this case, which is "Bootmgr is compressed.",
CHOOSE THE LAST OPTION - "Start Command Prompt".
 

 Step7>When Command Prompt is started,
Type the command below X:\System> 
(The string on the left is what appears on command prompt,may differ on other computers.)

X:\System>bootrec  /fixboot 
X:\System>bootrec /fixmbr 

Close Command Prompt window.
Click on Reboot Button.
(I worked for me without other problems)