Just one question guys:) Do you have 32or64 bit of Office?

Thanks Vickylily for your input:) Certainly there is something wrong with these values. I've left the Cortana on but I've changed back the default file format from xlsm to xlsx and it works. So in my...

Thank you Walid/Filip for your help! So the clean install one more time over the weekend:)

Hi Filip, Would you be able to check something for me? I've had the same problem (its a one of the KB updates causing it) so I reverted back to the W8.1. The slow opening was bad but the worst thing...