w7 showing as counterfeit

Hello MS ,

i have an archaic laptop , a travelmate7730 , into which i have inserted a hard drive from an even old acer laptop , where the motherboard shuffled off its mortal coil ,making the swap necessary .

all seems to work well , however, the home screen is stuck on black black its all black , and every now and then a helpful window pops up to tell me the w7 must be validated as genuine , ,an even more stroppy message is etched onto the bottom right hand corner of the screen telling me 'this copy of windows is not genuine ' ! (there actually isn't an exclamation mark , i have put that there to denote my subconscious reaction to said message of doom)

this hard drive is the original one , and so has the original w7 ,delicately fitted to the HD when the laptop was new , back in 1901 or whenever it was . i did check . and there's no port for shovelling coal into the laptop ,, so its newer than the stream age at least .

Now , since i know the W7 version is a genuine one , i do realise i have grounds to take Ms to course and mulct them for a few billion dollars for slander , however , since my yacht is quite big enough already , and the gardeners are doing a fine job on the estate , i wonder if you could simply tell me how to fix this ,so i can go back to me baize green screen of calm .

(please note , all the above re wealth is a total fantasy , and the complete opposite is true , however , i am time rich and layered in coruscating shades of zen patience)

thank you for energising the microsoft elite coding geniuses to solve this piffling problem .

regards

robert burnett esq.