hotplug.dll is a library file which allows Microsoft Windows users to safely remove, hotswitchable hardware such as PCMCIA devices.

hotsync.exe is a process which is deals with the Synchronisation of Palm-based PDAs to your computer. Set to start automatically, this application is always resident by default and should not be disabled where regular use of the PocketPC is concerned.

hottray.exe is the process associated with eFax, the application which allows a user to transmit faxes via e-mail. This program is a non-essential system process, and is installed for ease of use via the desktop taskbar.

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hp product research.exe is a process associated with HP Product Research from Hewlett-Packard Corporation.

hp wireless assistant.exe is a process that manages wireless connections such as wireless lan and bluetooth. This program is a non-essential process, but should not be terminated unless suspected to be causing problems.

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hpb2ksrv.exe is a process which belongs to the HP Status Monitoring Service. This program is a non-essential process, but should not be terminated unless suspected to be causing problems.

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hpbootop.exe is a process belonging to HP Boot Optimizer. This program is a non-essential process, but should not be terminated unless suspected to be causing problems.

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hpbpro.exe is installed alongside Hewlett Packard printers and offers local hardware and network support. This program is a non-essential system process, but should not be terminated unless suspected to be causing problems.

hpbpsttp.exe is a process belonging to HP Toolbox Startup. It is bundled together with HP LaserJet printers.

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hpcmpmgr.exe is the main process belonging to the HP Component Manager, and is important to the running of their range of multimedia products. This program is a non-essential process, but should not be terminated unless suspected to be causing problems.