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Windows development & engineering support from KomuraSoft

Windows Software Maintenance & ModernizationKeep essential software working for your business.

Add features, fix faults and improve performance while retaining familiar operations and reports. We start with the changes you need, rather than assuming a complete rewrite.

Discuss changes to your software See pricing & process

No specification document needed. Start with what you know.

  • Work directly with an engineer
  • Start before requirements are finalized
  • Commission only the scope you need

You do not need a finished specification

Start with the problem you need to solve.

Every change risks breaking something else

We check existing behavior and the impact of changes, including testing and rollback planning.

The original developer is no longer available

We help take over the software by examining the code, documentation and environments that remain.

It runs, but it is slow, unstable or difficult to update

We prioritize changes by their likely benefit and impact on operations.

Discuss the technical details with the engineer doing the work.

Profile photo of Go Komura

Founder & engineer

Go Komura

A Windows-focused engineer works with you from the initial discussion through investigation, design and implementation. You do not need to have every technical detail worked out before getting in touch.

Experience & technologies / Company information

Published technical case study

Investigating a crash after extended operation

We tracked handle counts and added logs at processing boundaries, narrowing the investigation to a handle leak.

Read the problem and investigation approach

Scope of support

A focused task or a complete application.

From a specific investigation or change to end-to-end development, we agree on a scope that fits your situation.

Features, fixes and ongoing maintenance

Feature additions, bug fixes and maintenance based on the current workflow and dependencies.

64-bit support and architecture updates

Assessment and changes for x86-based systems and their dependencies, taking mixed 32-bit and 64-bit operation into account.

Incremental modernization

Update high-priority areas to a more maintainable design without assuming a complete replacement.

Examples of results and deliverables

  • Current architecture and change impact assessment
  • Updated software and validation results
  • Deployment and rollback guidance with maintenance notes

These are examples, depending on the work commissioned. We agree on the scope and format of deliverables when preparing the estimate.

Facing a similar challenge? Tell us where things stand.

Discuss changes to your software

No specification document needed. Start with what you know.

Pricing and process

You do not need every detail decided to get started.

Start with an assessment and priority fixes

We check the source code and development environment, then agree on the behavior to preserve and the changes to make.

Pricing guide

Quoted for the maintenance scope

We consider the features, dependencies, investigation required and scope of ongoing maintenance before proposing the work.

Initial feasibility checks and paid engagements

Initial checks needed to assess feasibility and prepare an estimate are generally free, on the understanding that you will commission the full development if it is found feasible. Extended validation, dedicated environments, prototypes, proofs of concept and detailed investigation reports may require a paid engagement.

An investigation or review commissioned in its own right is quoted as a separate paid service. We explain the scope and cost before any paid work begins.

  1. Tell us about the situation

    Share your goal, the problem and the environment, as far as you know them.

  2. Review the scope and cost

    We outline the investigation needed, scope, deliverables, cost and proposed process.

  3. Agree before work begins

    During the work, we share progress, confirmed findings and remaining constraints.

  4. Review the results and handover

    We validate the results under agreed conditions and prepare for deployment or the next step.

Need more technical detail?

Explore technologies and the detailed approach

Keep familiar Windows software working for the years ahead.

Software that is essential to the business cannot simply be rebuilt overnight. KomuraSoft examines its functions and operating conditions before making changes or taking on maintenance. We do not assume a full replacement: the scope follows the expected benefit and impact.

Challenges we can help with

  • Add features while preserving current operations and reports.
  • Review the architecture because each change seems to cause another fault.
  • Improve slow operation or instability after extended use.
  • Address 32-bit assumptions or old components that obstruct environment upgrades.
  • Find a development and maintenance partner when the original developer is no longer available.

Changes and maintenance we support

We work on existing VB6, MFC and WinForms applications, including features, bug fixes, performance and code organization. Systems combining COM, ActiveX, OCX, C++ and C# are assessed with their dependencies in mind.

For 64-bit support or architectural updates, we check not only the application but also its DLLs, registration, permissions and deployment environments. We strengthen logging and tests where needed so that the effects of changes are easier to trace.

A phased approach that considers current operations

The key is to define the behavior that must stay the same, not just the parts that will change.

  1. Understand the current system. We review workflows, dependencies, development and deployment environments, and known problems.
  2. Focus the scope. We agree on priorities and impact, identifying what to retain and what to change.
  3. Prepare validation. We establish regression checks, logs and, where needed, rollback procedures.
  4. Introduce changes in stages. We validate each change and plan deployment around operating conditions.

Not sure whether to maintain or replace it?

Whether to keep improving the current software or build a replacement depends on its maintainability and expected period of use. We can investigate first and distinguish what can be addressed through changes from what merits replacement.

For a move centered on a new application, see Windows app replacement. Tell us what is difficult about the current software and whether its source, documentation and development environment are available.

Questions before commissioning work

Can you modify older Windows software?

You can bring us existing VB6, MFC or WinForms applications. We check the source code, development environment and dependent components to establish what can be changed and what preparation is needed.

Can we improve only the necessary parts before considering a rewrite?

Yes. We can work on priority fixes and features while keeping the current application in use. We agree on the change scope, functions to validate and rollback approach beforehand.

Can you help without documentation or the original developer?

Yes. We begin with the remaining documents, code and actual behavior, separating known specifications from areas that need further investigation.

Get in touch

A few lines about your situation are enough.

You do not need a detailed specification or technical terminology. Share what you know about:

  • The problem or the outcome you need
  • The software, devices and operating environment
  • Your preferred timeframe, even if it is not decided

There is no need to send confidential documents or passwords with your initial inquiry.

Example inquiry

We need to add features to a Windows application, but its original developer is unavailable. We would like help starting with an assessment of the existing software.
Discuss changes to your software Send an email

No specification document needed. Start with what you know.

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