My laptop previously used to startup and shut down fast but from two days its taking too long for start up and shut down also , i scan my laptop with Norton antivirus which is updated but no virus found and even tried registry mechanic also please suggest

1. Make sure you are plugged into A/C.. Your battery could be running low.
2. Make sure there is nothing blocking the heat vents. This symptom is typical for overheating processors.

Is the laptop free of dust in fan and vents? Is there sufficent air flow through the laptop, bottom and side vents? Shut down ALL unnessary programs at laptop start. Try CCLEANER freeware at :http://www.filehippo.com/download_ccleaner/, this freeware program will remove the junk from your machine. In TOOLS, STARTUP, Disable ALL unnessary startup programs, In the Internet Explorer Tab, Disable/ delete ALL TOOLBARS, they are killers on broswer speed. Try MALWAREBYTES freeware at : http://www.filehippo.com/download_malwarebytes_anti_malware/ In the installation, UNCHECK the TRIAL PRO version, you want the freeware version. Run a FULL SCAN, DELETE ALL RESULTS. Reboot machine. Take a look at this: http://www.pcworld.com/article/143538/windows_vista.html

Such problems occurs due windows internal errors. I would suggest to fix windows errors, also scan PC for registry errors. WebRepOverall ratingThis site has no rating(not enough votes)

For an instant fix use system optimizer PCFresher

If you don't already have it, You can download a program I use, CCleaner, at:http://www.filehippo.com/download_ccleaner/. I use this program to Clean the "junk" from my machines, I suggest it to all my clients,(I do Computer Maint.). The program will clean junk files, registry, temp files...etc. It also has a section in TOOLS> STARTUP that you can disable unwanted start up items. Over the years many program you add will want to start at Startup. If you do not address them your computer will start to "BOGG" down with all the startup items, I try to disable ALL programs not needed at start-up, You have to decide which/what is necessary at start up for your particular machine.CCleaner has many useful sections, and I have never had an issue with it's operation on my machines, safe to use. ALSO Do a GOOGLE search of How to speed up start up and shut down, PC WORLD is a good source.

look up what you have in the startup files, alot of stuf you download puts thier product in the startup and it will take longer for your pc to turn them on and off:

Goto start menu and type in:
MSCONFIG

goto start up and turn off anything that you do not need to run at start up....becareful that you do not turn off key components to your system...just look for software you have downloaded...this will help speed up your start up and shutdown....

Are you running your laptop on battery alone? If that's the case, run it with the charger plugged in. If that sorts it out then you need to change your laptop battery
or
Restart your computer, and then press F8 during the initial startup...

review the following recommendations and use one which applies. additional information can also be found on the same site.

good luck!

system restore tool at command prompt
http://support.microsoft.com/kb/304449/

restore the operating system to a previous statehttp://support.microsoft.com/kb/306084/

start your computer by using the Last Known Good Configuration feature
http://support.microsoft.com/kb/307852

Windows is toast, my friend. I hope you have a good backup, and recovery disks. It's probably malware, but the bottom line is Windows needs to be reinstalled.

Sounds to me like you are having a computer virus. The best thing to do here is to go first into safe mode and restore your system to a previous date a couple of days before this problem of yours started. try scanning your system. if it does not work in safe mode and you really need to go into normal mode. when you get the message immediately click on start then run. in the run window.. inside that text box, type in "shutdown -a". that would prevent you from restarting. do the scan from normal mode.

Applications load at Startup,some may not be required. you can disable Startup applications using MSCONFIG.

• Click Start, click Run and type MSCONFIG
• Click Startup tab on top and view the listings.
• Uncheck the applications which you want to disable from Startup
• Click OK

Windows XP does not require any program for mandatory Startup.
But you should leave the following to run at Startup.

• Firewall programs
• Anti-virus and anti-spyware utilities
• Keyboard software or related for hotkey functionality (this one is optional as well)
• Software provided by your Internet Service Provider (for Internet Connectivity)

Also run a cleaning program such as Ccleaner and an antivirus program such as spybot search and destroy to make sure your system is clean and free from viruses.

Please rate this a fixya.

try to scan your laptop for any virus first then try to disable all unwanted programs to run during startup,