Hi PrasannaSK,
I have brought this issue to the attention of Kaspersky and have confidence that it will be investigated. However from my limited understanding of the issue, Kaspersky is operating as it should, and validating the authenticity of the server used by Apple to deliver software products to the Apple Store users at their request. Because the server's certificate was reported to Kaspersky as being expired, Kaspersky flagged it as a problem, and did not permit access to that server. What was most troubling to me was the non-advice provided by Apple's pop-up when the server would not deliver the product requested and did not provide any meaningful advice to the user despite the user authenticating access with a correct password. I wonder how many users like you, would have had concerns about their password security and, as a consequence, unnecessarily changed their password only to find that they still could not access the server. Apple systems are great products, but occasionally I wonder what logic is used to address user experience interface problems, when I am confronted by meaningless alerts. Nonetheless, I am pleased that you have recovered your access. My hope is that the issue will be resolved (as it appears to me to be a fairly simple technical issue to solve) and conscientious users can again turn on the full protection of Kaspersky and similar products.
Enjoy!