Can Samsung GT-P1000 Galaxy TAB update to android 3.0 or 2.3?

You may need to do hard reset.
You didn't say make / model.
Here's an example:
Samsung Galaxy Tab GT P1000 hard reset
Samsung Galaxy Tab GT P1000 hard reset

You need to do hard reset:
Samsung Galaxy Tab GT P1000 hard reset
Samsung Galaxy Tab GT P1000 hard reset

sounds like it could do with a full reset.
http://www.hard-reset.com/samsung-galaxy-tab-gt-p1000-hard-reset.html

if that fails then go to the play store and download the samsung kies app. then also install the samsung kies program onto your laptop or computer. link the p1000 to the computer and see if there is an available update for the software.
samsung have said they did release one, the device when it came out was running on the FROYO software, and im sure they have a update to the jellybean but thats as far as they are going with this device

To get android 2.3 phone unlocked you need odin and c4 root
To install overcome Jupiter(for gingerbread). Try this site:
Sent from my GT-P1000 using XDA Premium App

This is the Samsung Galaxy Tab GT-P1000 Official User Manual available for download. (PDF format, 2.8 MB, 82 pages). See also: Samsung Galaxy Tab P1000 ... store.clintongoveas.com/99-samsung-galaxy-tab-gt-p1000-official-user-manual.html store.clintongoveas.com/99-samsung-galaxy-tab-gt-p1000-official-user-manual.html
went in and checked this site out - hope it helps you

Hi,

Good day. I''m afraid you might have accidentally got the Operating System of your Samsung Tab corrupted. Im referring to your firmware. Usually if the firmware upgrade failed you need to retry it until it be successful. If you restart it or discontinue the process it will cause your Samsung Tab to be corrupted resulting into failure of the boot up process. You might need to contact samsung tech support for this or bring your equipment to the nearest center. They might need to check the software install and usually their software specialist will fix it for you. Sorry for what happen with your tab but i know the samsung repair center can fix it for you. Hope this information will be helpful to you. Have a great day.

Install these drivers http://firon.net/xda/Samsung_Mobile_Driver_V1.3.800_For_SPH-d700_Epic_4G.zip for windows 32bit 
this should fix your problem

not yet :(

Hope this helps:

How to Hard Reset Samsung GT-P1000 Galaxy TAB:
If your Samsung GT-P1000 Galaxy TAB is frozen and unresponsive, press and hold [POWER ] for 8-10 seconds. The device will reboot automatically.
If this does not solve the problem, perform a factory data reset. In Menu
mode, select Settings ? Privacy ? Factory data reset ? Reset phone ? Erase everything.




Hard Reset Samsung GT-P1000 Galaxy TAB with keys With the Samsung Galaxy TAB turned off, press and hold the VOLUME DOWN button, and then briefly press the POWER button.