Uninstall hp products so to install new hp product

Hi,
If you are again driver installation then first you check it driver backup available or not. If available then ok or it not then you download first then re-installed it. Or if you are now printer add then old driver uninstalled and new printer installed it.
I share a link please visit and follow step by step instruction.
A> If you are uninstalled process then go to control panel and select add removed programs and search printer driver name and select and removed it.
B> Installation Process- first old driver uninstalled and new driver setup double click and follow instruction and full installed it.

More info visit it:-
http://h10025.www1.hp.com/ewfrf/wc/product?cc=us&lc=en&product=59305

Thanks,
HP Printer Support

Sir/Madam

Please Follow these steps to remove previous printer software and drivers, and then download the latest HP software and driver.
Step one: Remove the previous printer software installation Before you install the new software, first remove the previous printer software to make sure that you have only the latest software installed on your computer.
Use the following steps to remove the HP print driver and software from a Mac OS X computer.

1. Double-click the Macintosh HD icon from the desktop.
2. Click Applications , and then click the Hewlett-Packard folder.

Double-click the HP Uninstaller . The HP Uninstaller opens.

Click Continue .

Select the HP product to remove, and then click Uninstall .

When prompted, type the Administrator name and Password, and then click OK .

When the Uninstaller finishes, drag any icons for the product to the Trash .

Return to Applications , and then click the Utilities folder.

Double-click Activity Monitor . The Activity Monitor opens.

Under Process Name , click any process that begins with HP , and then click Quit Process

Click Quit again.

Close the Activity Monitor .

Empty the Trash .

NOTE: If you cannot delete some items, return to the Activity Monitor and end the process, and then try to empty the Trash again.Disconnect the product, and then restart your computer.

In Case you Still Having HP Printer Problem then visit official HP Website For HP Printer Issue

Or
In case You Still need Assistance Then follow Us On: HP Printer Support

Go to your device manager and go to the printers and remove it from there if you still believe there are others drivers go to add/remove programs and do a search for printers or print drivers there and remove. Restart the computer double check to ensure items are gone and out of your recycling bin - load and install new software.

run hp print diagnostic utility http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02072599&cc=us&lc=en&dlc=en&product=421991&tmp_track_link=ot_search
instructions on how to run it are included in that link.
if it does not fix your problem I strongly suggest you uninstall the hp printer software from your computer and reinstall it.if you still have the cd installer,insert it in the cd drive and select uninstall.if you do not have the disk uninstall it using add/remove (win xp) features or programs and features (for vista or win 7).make sure to uninstall all hp programs associated with your officejet 6210 (driver series,hp customer participation program,imaging device functions,shop for hp supplies,hp yahoo toolbar,hp image zone.hp memories disc,hp update,hp smart web printing,hp photosmart essentials). NOTE:uninstall programs enumerated above only when you have that printer installed on your pc because uninstalling them may affect the functionalities of other printers installed on your computer. handle is invalid error is caused by a dll file that got corrupted. after the uninstall,restart pc. then reinstall using the same cd or better yet download the latest version of software. here's the link for that.
http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?lc=en&dlc=en&cc=us&product=421991&

this could be due to corrupt HP Advisor files on the PC. If you are using Windows Vista, then perform the following steps.

** Uninstall and Reinstall HP Help and Support **
1. Click start, select Control Panel.
2. In Control Panel, select the option “Programs and Features”.
3. In Programs and Features window, select ‘HP Help and Support’ and click on uninstall.
4. Follow onscreen instructions to uninstall the application completely.
5. Restart the notebook.

Now download and install HP Help and Support from following web link:

http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-54787-1&lc=en&dlc=en&cc=us&product=3224052&sw_lang=&os=2093

Now download and install HP Support Library from following web link:

http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-54900-1&lc=en&dlc=en&cc=us&product=3224052&sw_lang=&os=2093

I hope this will help you to solve the problem.

Go to Control Pannel and Add remove Programs
and
Uninstall the HP Photosmart 8250 Inkjet Printer Drivers
or
Click start - control pannel - System - Hardware - Device manager - Select the Printer (+) and uninstall the Drivers

then Check by connecting the USB Cable to the Computer without installing the drivers

IF its NOT SHOWING " Found New Hardware Message " - then Please make sure the Printer is on / check replacing the USB Cable - the install the Drivers

If it should show the Found New Hardware Message - then we can deside to install the drivers for the Product

Then download the Updated drivers from HP Photosmart 8250

if above link don't work then
chek : http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?product=443024&lc=en&cc=us&dlc=en&lang=en&cc=us

According to the Operating System ..

Just go to add and remove program and uninstall the HP Product assistant is there and it will go fine

Complete uninstallation and installation will also help

You need to uninstall the product and install it using the correct product key.

Uninstall the printer and software.
Download the updated softweware and the driver for your current OS, Reinstall the new downloaded driver when installing the printer via windows control panel.

http://h10025.www1.hp.com/ewfrf/wc/product?product=3645100&lc=en&cc=us&dlc=en〈=en&cc=us

I think the next link, help you to solve the problem.

http://h10025.www1.hp.com/ewfrf/wc/product?product=79477&lc=en&cc=ro&dlc=ro&submit.y=0&submit.x=0&lang=ro&cc=ro

because it is clear to me: you need a reinstall the driver and software for your printer.
the latest utility can be found follow that link. don't forgot to uninstall your old driver in order to install the new driver. the complementary software is not necessary to be uninstalled.

on that site page select software & driver downloads
and for your problem, you MUST download and install: "HP full Solution Software Driver"

that's all!