I have an NEC Versa model pc-450-1521, that I bought used. During the boot, it goes through the drivers, virus scan, etc. It termiinates at a screen indicating MODEM INSTALLED, and then C:\> and is asking for a file name. What file name?

It would seem that a driver may be the cause which is loading during startup.
Suggest booting into safe mode by pressing F8 before laptop boots into Windows and then use msconfig to select the drivers to load at boot time.
Keep eliminating drivers until you locate the one causing the problem and then remove and check for a later verison of the driver.

Have you run a Virus scan and a malware scan? when you say" Whenever i use it, for about 2 min to 3 min, the computer started to hang and not responding" whenever I use it means what just moving the cursor or going online, opening a program etc. could you be a bit more specific that would help in the diagnosis.

You can download drivers from the NEC WEB site.
Please click on this link and select your model notebook and the Windows XP or Vista drivers you require :-.
www.nec.com/global/support/downloads/index.html

You best bet is to use DriverAgent.com from Phoenix to scan your Nec for out of date and missing drivers. This is one of the best ways to make sure you have the latest drivers for your system and to keep them updated.

You can download drivers from the NEC WEB site.
Select your model notebook and the Windows XP or Vista drivers you require. Use this link.
www.nec.com/global/support/downloads/index.html

You download the drivers from the NEC WEB site, make sure you select your model laptop/computr and the correct XP or Vista version of the drivers.
Use this link :
http://www.nec-computers.co.uk/support/

You can download drivers fro the NEC WEB site, their support/download page. Make sure you select your model laptop and the correct Windows version of the driver you require.

Use this link :-
http://www.nec-computers.co.uk/support/

Please post the complete model name: Ex: NEC VersaPro VY22/RX-L . What O.S. (Operating System) you're using. So that I can find the right drivers for you.

Joelmar, you are incorrect. This model was also sold with xp, I'm typing this on one. If you still have the original Hdd and have not formatted the recovery partition, boot up the laptop whilst holding the f11 key. This will start NEC recovery and allow you to reinstall the system, drivers included. Back up first!

You have to scan the drive(s) for more virus.
If u recently install any new hardware disconnect it until u finish load windows service pk 2.
Or try again re-installing windows remembering not to plug in any cards etc.
thanks
Jaywizz