HELLO. my update wont work. error code 80071a91

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acer 7739z 4439

 

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9HELLO. my update wont work. error code 80071a91 bought my laptop privatly december 2012. win 7 premium. 64 bit. also cant do many things because of a .net framework problem..is this related? could i have purchased a stolen computer ? is this

 

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