posted on May, 17 2014 @ 09:14 AM
A lot of computer manufacturers online will re-use what is known as a Volume License key for their Windows installations. Most of the time, they are
using it improperly. When Microsoft does audits of their registrations, they shut off keys that may have been abused or used improperly.
Unfortunately, this is the fault of the sellers and re-sellers, not the consumers, but when you reach out to either the seller or Microsoft, they will
tell you to purchase a valid key.
Don't be surprised if this is the case with your laptop, it's been happening for years.
Another thing that can cause a similar problem is if you make any serious changes to hardware. The Windows Activation is based on a generated key that
comes from the combination of hardware you use, so when you change any large part on your computer, it can end up causing a re-activation or
registration. Microsoft allows for this to happen up to ( I think ) 5 times or 5 hardware changes, and then you have to call them.
You'll be able to use your computer for a period of time, but it will eventually stop letting you log in, usually after 30 days.