This is a mandatory update!
Due to the recent finding of a vulnerability in the zerocoin protocol, it has to be temporarily disabled.
You can read more on this topic on Zcoins blog:
All that we can say right now is, that this issue is reported to be fixable and the Noir network was not effected or attacked. We will look to solve this issue as soon as possible.
Backup your wallet.dat!
Run Noir Core 184.108.40.206
Windows scaling issue with higher than 100% scaling set