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#21
There are government rules and regulations for cleaning drivers before sale or disposal.
To fulfil the government regulations the computer manufacturer's may install tools in the BIOS.
HP sells a lot of computers to government agencies and typically has the tools in the BIOS.
Each computer needs to be checked to see if there are onboard tools.
A clean install can take care of common cleaning. However the government has higher standards of cleaning and depending on how important or confidential the files are there are other cleaning options.
One tool is for HD and another is for SSD.
Disk sanitizer
Secure erase
There are tools that are external:
http://h10032.www1.hp.com/ctg/Manual/c01631502