Ok....

You purchase a PC with bundled software, say with Microsoft Office 2003. You register it under you name Joe Blow. A year later, you build yourself a new PC and install the same copy of Microsoft Office on your new PC. Everything is fine. Now however ifyou were to sell you Old PC with the bundled software, the new user of that PC can use all the Pre-Bundled software that is one the PC, but they 'Willnot" be able to register it, cause it is already registered to you. It is your software. These people who a reselling OEM software are basically pirating it from somone elses machine. That is why they say you will not be able to register it. My suggestion......don't buy it..!!