Hi and welcome to SevenForums,
How exactly did you attempt to open the doc ?
Did you open word and search for the file or did you click on the doc expecting it to open in word ?
Cheers.
My Computer
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom assembled by me :}
OS
Win-7-Pro64bit 7-H-Prem-64bit
CPU
i7-5930K 2nd i9-9940x both water blocked VRM's too
2nd ASUS X299 Apex/Intel i9-9940x with Custom water loop/7H-Prem-x64/Corsair 450D case/Ram Trident-z 3600C16 4x8gb / Samsung970Evo plus 500gb SSD/Dual ssd EZ swap evo/PSU EVGA SuperNova 1200w-P2 80+Platinum/GPU Titan Xp /8-ML-140 on push-pull on 2-280GTX rads
Did you try doing a System Restore as mentioned in that website you supplied.
I know it's probably a bit late now but having back ups of important files is essential. In fact I do a weekly image of my hard drive once a week to an external hard drive.