To address compatibility challenges, Microsoft discreetly tweaked third-party software to run smoothly on Windows 95. This involved a strategic approach where compatibility was a core concern.
Background of Windows 95 Adjustments
Prior to automatic updates, the Windows 95 team worked on an application compatibility database. This system used compatibility flags and binary patches—small changes to code—to modify software behavior. Veteran Microsoft engineer Raymond Chen noted that Windows 3.1 relied on APPS.INF and user input to manage software with shared filenames, whereas Windows 95 employed automated processes.
Windows 95 introduced a new detection system, using strings stored in the Registry to identify compatibility issues. When a 16-bit program meant for older Windows versions was initiated, the system applied adjustments if necessary. This cutting-edge approach helped Microsoft maintain backward compatibility, a pivotal element in its success.
Methodology and Vendor Cooperation
Microsoft sought written permission from software vendors before making adjustments, outlining the problem and negotiating solutions for future releases. Patches used identifiers such as Add and Change, with numeric suffixes if multiple fixes were required. Importantly, match algorithms relied on file size, a resource-efficient choice over deeper content analysis.
Such actions allowed Microsoft to ensure many older applications continued to function, addressing compatibility issues long before automatic updates were common. The compatibility focus illustrated by Windows 95 has impacted the company's strategies well into later versions, including decisions on Windows 10's lifecycle.
