Is Ubuntu good for my business?

On a business installation i strongly suggest to you to install ubuntu 10.04.3 LTS release and upgrade only to lts release... (12.04 lts) not at release date but when the Ubuntu 10.04 will end the user support... April 2013

https://wiki.ubuntu.com/Releases

I use ubuntu 10.04 in my business works every day...

I'm not expert in graphic.
All 9 PC are same model ?
Connect an external monitor on laptop. Ubuntu have currently issues with back light management. Do you see correctly the screen.
What is PC model, and graphic chip model ?
When you boot on Ubuntu CD, and choose try, do you get a good screen ? In this case, please report result of command: sudo lshw -C display and uname -a
Are you using 10.04.3 LTS (Long Term Support), 11.04 or 11.10 ? The LTS version is designed for business, and supported 3 years.
It is possible to buy support from Canonical.
And what is your business ? Which software will you use ?

#1
Laptop isn't a desktop computer, they usually content specific vendor devices only for laptops, rather useless to compare.
#2
Companies and legal authorities run Ubuntu LTS.
Canonical offers business support services.
http://www.ubuntu.com/business/services/overview
#3
Question 179144 did get answers, you gave only one answer as follow-up.
Lack of information only allows to speculate, since speculation doesn't help anyone, what do you expect to hear?

Anyway, the issue described can be anything, but rather sounds like hardware failure at first glance.

Freezes out of a sudden may be due to a weak graphic card, corrupted filesystem, new kernel doesn't load a module correctly, maybe wireless or it doesn't get a long with graphic card driver and so forth.

Maybe read this,
http://www.chiark.greenend.org.uk/~sgtatham/bugs.html

and provide more details.
Any idea which changes could have cause the issue?
Which steps were taken to investigate, what was the result?
Which laptop, graphic card, driver?
Which kernel?
Has there been an attempt to boot another kernel?
Has there been an attempt to update the system via recovery mode?
Was there an attempt to check the filesystem?
https://help.ubuntu.com/community/TestingStorageMedia
Have BIOS settings been checked, e.g. running a self-test?
Has there been an attempt to boot from any liveCD or rescue CD?
Is it possible to switch to a virtual console after boot? (ctrl+alt+f1)
(If yes, plug in usb-stick and move important files.)
https://help.ubuntu.com/10.04/basic-commands/C/

Many of us use Ubuntu in a business environment without any problems. Desk top PCs have fewer issues than laptops as they tend to use more standard Hardware. I don't see any issues provided

1. You check you meet the system requirements
https://help.ubuntu.com/community/Installation/SystemRequirements

2. Stick to LTS releases only i.e. use 10.04.3 and don't upgrade to the next LTS issue until 10.04 is nearly out of support

3. Check that all the software you need is available under Ubuntu. For example I still have a Windows PC because I need to use a particular CAD package.

4. Make sure you have an adequate Back-up system. Hardware can fail in any PC regardless of the OS used.

If you are still concerned look at paid support options

e.g. Munich migrated to 10.04 with a little more than nine clients.
http://translate.google.de/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fwww.it-muenchen-blog.de%2F2011%2F08%2Fmunchen-bringt-neues-release-4-0-des-limux-clients-heraus%2F&act=url

.n m896a

Happy thanks giving to all
thank you all for your help,

Marcobra, it looks like the consensus is to use LTS releases for business. I do not know what is LTS but I will research it

Delance, The external monitor is a good idea I will try it. I am using 11.10

Sam, you are right about the lack of information, I am not a techie and I know little about computers. Here what I know. The laptop is Compaq Presario CQ62. I bought it on black Friday last year with windows 7 on it. I immediately installed Ubuntu 10.10 and got rid of windows. Then upgraded to 11.04 in April and 11.10 in October and had no problems until about 2 weeks ago. Apart from the daily update using update manager, I did not install any thing.
1. Yes I tried recovery mode , but the computer freezes in the middle of that process
2. I did not check the BIOS, since I do not know how to
3. Yes tried to boot from Live CD but was not successful. I restart with the CD in but nothing happens
4. I just tried ctrl+alt+f1 and again just black screen

I will be more than happy to answer your questions

Warren, thanks for the advice. I will keep one windows machine for Quicken that I use for payroll, till I get something similar for Ubuntu

Thank you all again, and happy thanks giving

Gami, thanks for the info.

10.04 LTS is the version before 10.10 which you've started with.
https://wiki.ubuntu.com/LTS
http://releases.ubuntu.com/lucid/
https://wiki.ubuntu.com/LucidLynx/ReleaseNotes/ChangeSummary/10.04.3

> 3. Yes tried to boot from Live CD but was not successful. I restart with the CD in but nothing happens

You need to set boot option in BIOS to boot from CD.
If uncertain, try to get in touch with someone from your LoCo team.
http://loco.ubuntu.com/teams/

Directly after the computer starts it needs a certain key to press to access the BIOS (handbook of vendor).
For example try ESC or DEL key many times until it displays BIOS setup.
https://help.ubuntu.com/community/BootFromCD#BIOS_is_not_set_to_boot_from_CD_or_DVD_drive

There're different models from CQ62, with Intel or amd graphic card, but they shouldn't cause the problem.
Did the freeze start after an update procedure which required a reboot?

Did you create a separate /home partition?