My company gave me a old used computer for my personal use at home. But I am not able to access any external drives(USB) . I receive an error message as access denied. Being a local admin to that computer i was not able to change the setting as only the domain admin has the security rights. Since I have moved to another company I was not able to contact he system admin. Further I am not interested in re-installing the operating system as all the software's & applications are original licensed versions. Is there any other way being a local admin to change the setting???
If it's still a member of the old domain you will sooner or later run into more problems than you want to - wipe and reinstall the thing is really the only recommendable course of action.
You're using a machine that someone else is in control of, even if it's not actively connected to the company anymore all the policies and software is still theirs and may do things you won't sign off on. It cannot be trusted, even for home use.
For the record, the company that let you take a domain computer home for non-company use without wiping it and reloading it with a non-company-related installation certainly did something wrong.
I am not 100% sure about this, but....be sure, at the login screen, that you are logging into that computer and not still logging into the domain. Although the domain isnt available at your home, the machine will remember those settings and let you log into whatever account you were using on the domain. Make sure the field 'log on to' is the local machine and not the domain.
If you have the administrator login and password for this machine and not domain admin credentials, then it may work.
If you do not have these credentials, then run an ophcrack CD to get them.
EDIT - going to test this at work this morning...will remove if not accurate...