How to make Mozilla Firefox faster?

1. Type "about:config" into the address bar and hit return. Scroll down and look for the following entries:

network.http.pipelining
network.http.proxy.pipelining
network.http.pipelining.maxrequests

Normally the browser will make one request to a web page at a time.
When you enable pipelining it will make several at once, which really
speeds up page loading.

2. Alter the entries as follows:

Set "network.http.pipelining" to "true"
Set "network.http.proxy.pipelining" to "true"
Set "network.http.pipelining.maxrequests" to some number like 30. This
means it will make 30 requests at once.

3. Lastly right-click anywhere and select New-> Integer.

Name it "nglayout.initialpaint.delay" and set its value to "0".
This value is the amount of time the browser waits before it acts on information it recieves.

Chat with Friends through MS DOS Command Prompt

Lets do chating via windows command prompt..

FOLLOW THE STEPS:

1) All you need is your friend's IP Address and your Command Prompt.

2) Open Notepad and write this code as it is.....!

@echo off
:A
Cls
echo MESSENGER
set /p n=User:
set /p m=Message:
net send %n% %m%
Pause
Goto A

3) Now save this as "Messenger.Bat".

4) Open Command Prompt.

5) Drag this file (.bat file) over to Command Prompt and press Enter.

6) You would then see something like this:

7) Now, type the IP Address of the computer you want to contact and press enter.

You will see something like this:

8) Now all you need to do is type your message and press Enter.
Start Chatting.......Enjoy.......!

Open or Close cd-rom using cmd

For that you have to download NirCmd tool...

Download NirCmd

To open the door of J: CD-ROM drive 

just type in 

nircmd.exe cdrom open j: 

To close the door of Y: CD-ROM drive  

just type in

nircmd.exe cdrom close y: 

List of CMD(Command prompt) commands

Accessibility Options : access.cpl
Add Hardware : hdwwiz.cpl
Add / Remove Programs : appwiz.cpl
Administrative Tools : control admintools
Automatic Updates : wuaucpl.cpl
Wizard file transfer Bluethooth : fsquirt
Calculator : calc
Certificate Manager : certmgr.msc
Character : charmap
Checking disk : chkdsk
Manager of the album (clipboard) : clipbrd
Command Prompt : cmd
Service components (DCOM) : dcomcnfg
Computer Management : compmgmt.msc
DDE active sharing : ddeshare
Device Manager : devmgmt.msc
DirectX Control Panel (if installed) : directx.cpl
DirectX Diagnostic Utility : dxdiag
Disk Cleanup : cleanmgr
System Information : dxdiag
Disk Defragmenter : dfrg.msc
Disk Management : diskmgmt.msc
Partition manager : diskpart
Display Properties : control desktop
Properties of the display (2) : desk.cpl
Properties display (tab "appearance") : control color
Dr. Watson : drwtsn32
Manager vérirficateur drivers : check


Event Viewer : Eventvwr.msc
Verification of signatures of files : sigverif
Findfast (if present) : findfast.cpl
Folder Options : control folders
Fonts (fonts) : control fonts
Fonts folder windows : fonts
Free Cell : freecell
Game Controllers : Joy.cpl
Group Policy (XP Pro) : gpedit.msc
Hearts (card game) : mshearts
IExpress (file generator. Cab) : IExpress
Indexing Service (if not disabled) : ciadv.msc
Internet Properties : inetcpl.cpl
IPConfig (display configuration) : ipconfig / all
IPConfig (displays the contents of the DNS cache) : ipconfig / displaydns
IPConfig (erases the contents of the DNS cache) : ipconfig / flushdns
IPConfig (IP configuration cancels maps) : ipconfig / release
IPConfig (renew IP configuration maps) : ipconfig / renew
Java Control Panel (if present) : jpicpl32.cpl
Java Control Panel (if present) : javaws
Keyboard Properties : control keyboard
Local Security Settings : secpol.msc
Local Users and Groups : lusrmgr.msc
Logout : logoff
Microsoft Chat : winchat
Minesweeper (game) : winmine
Properties of the mouse : control mouse
Properties of the mouse (2) : main.cpl
Network Connections : control NetConnect
Network Connections (2) : ncpa.cpl
Network configuration wizard : netsetup.cpl
Notepad : notepad
NView Desktop Manager (if installed) : nvtuicpl.cpl
Manager links : packager
Data Source Administrator ODBC : odbccp32.cpl
Screen Keyboard : OSK
AC3 Filter (if installed) : ac3filter.cpl
Password manager (if present) : Password.cpl
Monitor performance : perfmon.msc
Monitor performance (2) : perfmon
Dialing Properties (phone) : telephon.cpl
Power Options : powercfg.cpl
Printers and Faxes : control printers
Private Character Editor : eudcedit
Quicktime (if installed) : QuickTime.cpl
Regional and Language Options : intl.cpl
Editor of the registry : regedit
Remote desktop connection : mstsc
Removable Storage : ntmsmgr.msc
requests the operator to removable storage : ntmsoprq.msc
RSoP (traduction. ..) (XP Pro) : rsop.msc
Scanners and Cameras : sticpl.cpl
Scheduled Tasks : control schedtasks
Security Center : wscui.cpl
Console management services : services.msc
shared folders : fsmgmt.msc
Turn off windows : shutdown
Sounds and Audio Devices : mmsys.cpl
Spider (card game) : spider
Client Network Utility SQL server : cliconfg
System Configuration Editor : sysedit
System Configuration Utility : msconfig
System File Checker (SFC =) (Scan Now) : sfc / scannow
SFC (Scan next startup) : sfc / scanonce
SFC (Scan each démarraget) : sfc / scanboot
SFC (back to default settings) : sfc / revert
SFC (purge cache files) : sfc / purgecache
SFC (define size CAHC x) : sfc / cachesize = x
System Properties : sysdm.cpl
Task Manager : taskmgr
Telnet client : telnet
User Accounts : nusrmgr.cpl
Utility Manager (Magnifier, etc) : utilman
Windows firewall (XP SP2) : firewall.cpl
Microsoft Magnifier : magnify
Windows Management Infrastructure : wmimgmt.msc
Protection of the accounts database : syskey
Windows update : wupdmgr
Introducing Windows XP (if not erased) : tourstart
Wordpad : write
Date and Time Properties : timedate.cpl
Accessibility Options : access.cpl
Add Hardware : hdwwiz.cpl
Add / Remove Programs : appwiz.cpl
Administrative Tools : control admintools
Automatic Updates : wuaucpl.cpl
Wizard file transfer Bluethooth : fsquirt
Calculator : calc
Certificate Manager : certmgr.msc
Character : charmap
Checking disk : chkdsk
Manager of the album (clipboard) : clipbrd
Command Prompt : cmd
Service components (DCOM) : dcomcnfg
Computer Management : compmgmt.msc
DDE active sharing : ddeshare
Device Manager : devmgmt.msc
DirectX Control Panel (if installed) : directx.cpl
DirectX Diagnostic Utility : dxdiag
Disk Cleanup : cleanmgr
System Information : dxdiag
Disk Defragmenter : dfrg.msc
Disk Management : diskmgmt.msc
Partition manager : diskpart
Display Properties : control desktop
Properties of the display (2) : desk.cpl
Properties display (tab "appearance") : control color
Dr. Watson : drwtsn32
Manager vérirficateur drivers : check
Event Viewer : Eventvwr.msc
Verification of signatures of files : sigverif
Findfast (if present) : findfast.cpl
Folder Options : control folders
Fonts (fonts) : control fonts
Fonts folder windows : fonts
Free Cell : freecell
Game Controllers : Joy.cpl
Group Policy (XP Pro) : gpedit.msc
Hearts (card game) : mshearts
IExpress (file generator. Cab) : IExpress
Indexing Service (if not disabled) : ciadv.msc
Internet Properties : inetcpl.cpl
IPConfig (display configuration) : ipconfig / all
IPConfig (displays the contents of the DNS cache) : ipconfig / displaydns
IPConfig (erases the contents of the DNS cache) : ipconfig / flushdns
IPConfig (IP configuration cancels maps) : ipconfig / release
IPConfig (renew IP configuration maps) : ipconfig / renew
Java Control Panel (if present) : jpicpl32.cpl
Java Control Panel (if present) : javaws
Keyboard Properties : control keyboard
Local Security Settings : secpol.msc
Local Users and Groups : lusrmgr.msc
Logout : logoff
Microsoft Chat : winchat
Minesweeper (game) : winmine
Properties of the mouse : control mouse
Properties of the mouse (2) : main.cpl
Network Connections : control NetConnect
Network Connections (2) : ncpa.cpl
Network configuration wizard : netsetup.cpl
Notepad : notepad
NView Desktop Manager (if installed) : nvtuicpl.cpl
Manager links : packager
Data Source Administrator ODBC : odbccp32.cpl
Screen Keyboard : OSK
AC3 Filter (if installed) : ac3filter.cpl
Password manager (if present) : Password.cpl
Monitor performance : perfmon.msc
Monitor performance (2) : perfmon
Dialing Properties (phone) : telephon.cpl
Power Options : powercfg.cpl
Printers and Faxes : control printers
Private Character Editor : eudcedit
Quicktime (if installed) : QuickTime.cpl
Regional and Language Options : intl.cpl
Editor of the registry : regedit
Remote desktop connection : mstsc
Removable Storage : ntmsmgr.msc
requests the operator to removable storage : ntmsoprq.msc
RSoP (traduction. ..) (XP Pro) : rsop.msc
Scanners and Cameras : sticpl.cpl
Scheduled Tasks : control schedtasks
Security Center : wscui.cpl
Console management services : services.msc
shared folders : fsmgmt.msc
Turn off windows : shutdown
Sounds and Audio Devices : mmsys.cpl
Spider (card game) : spider
Client Network Utility SQL server : cliconfg
System Configuration Editor : sysedit
System Configuration Utility : msconfig
System File Checker (SFC =) (Scan Now) : sfc / scannow
SFC (Scan next startup) : sfc / scanonce
SFC (Scan each démarraget) : sfc / scanboot
SFC (back to default settings) : sfc / revert
SFC (purge cache files) : sfc / purgecache
SFC (define size CAHC x) : sfc / cachesize = x
System Properties : sysdm.cpl
Task Manager : taskmgr
Telnet client : telnet
User Accounts : nusrmgr.cpl
Utility Manager (Magnifier, etc) : utilman
Windows firewall (XP SP2) : firewall.cpl
Microsoft Magnifier : magnify
Windows Management Infrastructure : wmimgmt.msc
Protection of the accounts database : syskey
Windows update : wupdmgr
Introducing Windows XP (if not erased) : tourstart
Wordpad : write
Date and Time Properties : timedate.cpl

How to temporarily lock pc when someone enter wrong password?

From startup search box search for Local Security Policy and open it.

Then from security settings browse following.

Account pollicies > Account lockout policy > Account lockout threshold

Then give the value after how many invalid password attempts you want to lock your computer.