A big safety replace rolled out by Microsoft with the Home windows 11 24H2 (KB5063878) launch is inflicting widespread points for customers, with reviews surfacing that the replace can render SSDs and HDDs inaccessible and should doubtlessly corrupt person information.
Final week’s Patch Tuesday (August 2025) noticed Microsoft launch a number of crucial safety updates for Home windows 10 (KB5063709 / KB5063877 / KB5063871 / KB5063889) and Home windows 11 (KB5063878, KB5063875) methods.
Amongst them was a vital Defender replace, supposed to sort out the Lamma stealer malware present in new Home windows ISO installations. Nevertheless, as customers and specialists rapidly found, the repair launched unintended uncomfortable side effects for storage units on Home windows 11 24H2.
Storage Units Disappear, Knowledge at Danger
The difficulty started when customers began experiencing set up failures with error code 0x80240069 on the KB5063878 replace, however Microsoft’s subsequent hotfix appeared to alleviate these points. Sadly, that didn’t mark the tip of the saga.
In accordance with a report highlighted by cybersecurity neighborhood members and corroborated by an X (previously Twitter) person @Necoru_cat, the most recent 24H2 replace triggered crucial failures with storage drives. Customers report that after putting in the replace, SSDs and HDDs can disappear from the Home windows setting, with SMART (Self-Monitoring, Evaluation, and Reporting Know-how) attributes turning into unreadable.
The difficulty appears to manifest most acutely throughout giant sequential write operations. In a single documented case, the issue turned evident when updating a recreation (Cyberpunk 2077), inflicting the drive to fade mid-transfer.
As soon as the drive disappears from the system, makes an attempt to recuperate information are sometimes unsuccessful, placing person information at important danger.
This isn’t the primary time a Home windows replace has induced issues for {hardware} efficiency, significantly amongst PC players and energy customers. Many affected customers report the issue whereas gaming or updating giant recreation information, the place heavy drive exercise is frequent.
The shortcoming to entry drives or the danger of knowledge corruption can have extreme penalties, significantly for customers with crucial work or irreplaceable information.
As of this writing, Microsoft has not issued an official repair for the storage drive disappearance situation. Customers are suggested to keep away from putting in the KB5063878 replace if potential, particularly if counting on giant file transfers or crucial SSD/HDD storage.
For these affected, unplugging the impacted drive and reconnecting it might quickly restore visibility, however this isn’t an assured answer and should not stop future information loss or corruption. Routine information backups and delaying set up of the problematic replace are strongly really useful.
Enhance your SOC and assist your crew shield your enterprise with free top-notch menace intelligence: Request TI Lookup Premium Trial.
