“Our own experience is that system instability can in some circumstances cause data loss or corruption,” Microsoft wrote, adding “We understand that Intel is continuing to investigate the potential impact of the current microcode version and encourage customers to review their guidance on an ongoing basis to inform their decisions.”At the moment, there are no known attacks for Spectre variant 2.
This applies only to the Spectre patch, Microsoft emphasised: “Application of this payload specifically disables only the mitigation against CVE-2017-5715 – 'Branch target injection vulnerability.'”
Via: The Register