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Microsoft Software Media

Incident Summary

Microsoft distribution media shipped with Form virus.

In 1995, Microsoft acknowledged accidentally distributing software installation floppy disks (reportedly including some for Windows 95 upgrades) infected with the common 'Form' boot sector virus. The infection likely occurred during mass disk duplication. While not destructive, the virus caused audible clicking sounds on infected PCs on the 18th of the month.

Date
1995-01-01 to 1995-12-31
Category
Commercial
Target Surface
Distribution
Insertion Phase
distribution
Impact
Nuisance
Cause
Manufacturing error

What Was Affected

Package Microsoft Software Media
ComponentOS / Application
Artifact typefloppy disk
Domain typeproject download host
Domain microsoft.com

Compromised Versions

  • Specific batches of Microsoft software floppy disks circa 1995 (e.g., Windows 95 upgrade)

Incident Context

Motive
Not applicable
Attribution
Accidental
Transitive
No
Observed Duration
364 days

Evidence

Compromised Artifacts

  • Infected Microsoft floppy disks

External References

Source Data

Source record: proprietary/win95_demo/meta.yaml