Symantek announced today it will shut down all its Windows server services including Windows Defender, Microsoft Security Essentials, Microsoft Virtual Center, and Microsoft Hyper-V.

Symanteback’s decision follows reports of malicious code targeting Microsoft’s servers that has compromised more than 3 million Windows PCs since September.

Microsoft said it will not provide refunds or support for any customers affected by the malicious code.

Symanteak will be the last of its kind in the world.

Symantec’s decision comes a day after Symantech reported a breach of more than 4 million Microsoft Azure servers.

Microsoft did not immediately respond to a request for comment.

Microsoft’s security experts have been working with Symanteeak and Microsoft security partners to protect customers’ data since last year, but this was the first time Symantesys decision to stop its services would impact customers.

Microsoft, Symanteks management, Symanceks parent company EMC, Symanteaks Chief Information Security Officer Mark Hildebrand, and Symanteco have made no public statements about Symantemes decision to shut the services down.

The decision by Symantekaec comes as Symantets security teams work to resolve the Microsoft Azure security breaches, including a breach that compromised more to 4 million Windows servers in late November and a separate breach that affected Microsoft Windows Server, Microsoft Hypervisor, Microsoft SQL Server, and Windows Server 2008.

Symantiek said it had worked with Microsoft to identify a vulnerability in the Windows Server operating system that allowed attackers to steal credentials from Symantetechs Windows Server services.

Microsoft also said it was working with the Symantepack Security team to investigate the breach and will provide support for affected customers.

Symanticech’s decision also comes at a time when the security and privacy community has been increasingly concerned about the potential for malicious software to exploit vulnerabilities in Microsoft’s Azure cloud computing platform, and the company has also been working to improve its security measures.

Microsoft is currently investigating the Microsoft cloud-based services for potential vulnerabilities and said it would provide a patch to customers within a week.

Symanteak said in a statement that it will continue to support Symantenets customers and partners and will continue its security operations as usual.

It said that it would not disclose any specific dates for when customers would be notified of its decision.