My computer is stuck in 16 bit color and 640 X 480. I don't know the model number but I do have the serial number. CN-0P0151-64180-47M-34S6. I need to down load the driver.

https://support.hp.com/us-en/computer

ask them, we are not them nor can we decode there service tags
here is a history off all HP, tags, 3 major generations

• bottom of PC , a desktop has 6 sides look on all 6 yet?
• in battery well laptop.
• bios screen #1 info it is there.

is the PC a desktop, not told .
cn , number means china part number I do know that.

https://www.pcdied.com/TAG-jive/tag.html#hpdt

Call Coach at 888-262-6224. Give the customer service representative the bag's serial number. An authentic Coach handbag has a serial number registered with Coach, and the representative can determine authenticity immediately over the phone

That serial number doesn't seem to match any of the formats I have found. The "CN" could indicate the year 1982. The "MN" could indicate manual-tilt and counter rotation.
From this resource: http://www.maxrules.com/OMC_models.html

yes you cn call the company with model and serial number.price to cheap is not good

It's hard to say, not knowing who the manufacturer is and the model number.

Restart the computer
2 While the computer is loading, press "F8" key on the keyboard right before the
computer reads the hard drive or press the "F8" key multiple times in 1 second
interval until the "Windows Advanced Options Menu" appears on the screen
3 Under "Windows Advanced Options Menu", using the arrow key on the
keyboard, select "Enable VGA Mode" then press Enter. Select "Windows 2000
or Windows XP" for your operating system.
4 Wait while the computer is loading and once the computer finishes loading,
5 Right Click anywhere on the blank area on the desktop then click "Properties"
6 Click on "Settings"
7 Click on "Advanced"
8 Click on "Adapter"
9 Click on "List All Modes..."
10 We recommend that for 15" LCD's select 1024x768, True Color (32 Bit) 60
Hz or 1024x768, High Color (16 Bit), 60 Hertz; For 17" & 18" LCD's select
1280x1024, True Color (32 Bit), 60 hertz, or 1280x1024, High Color (16 Bit)
60 Hertz, or
640x480, 256 colors, 60Hertz or 75Hertz
640x480, High Color (16 bit), 60Hertz or 75Hertz
640x480, True Color (32 bit), 60Hertz or 75Hertz
800x600, 256 Colors, 60Hertz or 75Hertz
800x600, High Color (16 bit), 60Hertz or 75Hertz
800x600, True Color (32 bit), 60Hertz or 75Hertz
1024x768, 256 colors, 60Hertz
1024x768, High Color (16 bit), 60Hertz
1024x768, True Color (32 bit), 60Hertz

11 Additional Valid Modes for use only with 17" & 18" LCD Monitor
1280x1024, 256 colors, 60Hertz
1280x1024, High Color (16 bit), 60Hertz
1280x1024, True Color (32 bit), 60Hertz

http://www.youtube.com/watch?v=EDylk9ezQtA

I am not sure if the number on the case is the one required. The TI89 Titanium and other recent TI machines have a unique ID. To get it, turn the calculator ON, Press F1 select 3: About.
On the subsequent screen, one finds various bits of information among which is a product ID and a 14 digit hexadecimal number ID ( a number in base 16, with Arabic digits 0 to 9, plus and A, B,C,D,E, and F)

The same number can be revealed by TIConnect software:
After machine is recognized, click TI Device Info. The Device ID is returned under General Information Tab or ID list tab.
This device ID could be the one needed for the Calculus Made Esay. software

Go to the IBM/Lenovo WEB site - support/download page and download the latest Windows XP or Vista device drivers for your model computer,
Use this link :-
http://www.ibm.com/products/finder/us/finders?pg=ddfinder&cm_re=other-_-suprcn-_-download

You need a video card driver, but didn't specify which video card you have. Looks like this -might- be the right one:
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-4JRNJB