Startup idea: Forensic File-Deletion Tracing Beyond Windows Logs
PDFs vanish from a network share and the audit log only shows the same user and laptop with 'PID 4 (System)'. Standard logs can't explain what happened.
Get the PRD prompt, $9.99 Market: $240K in 3 years
r/sysadmin · Sep 14, 2026 – Oct 14, 2026 · 47 upvotes
PDFs exported from Excel to a network drive share…
Read the thread · 45 comments
Forensic File-Deletion Tracing Beyond Windows Logs is a startup idea for sysadmins. PDFs vanish from a network share and the audit log only shows the same user and laptop with 'PID 4 (System)'. Standard logs can't explain what happened. A thread in r/sysadmin drew 47 upvotes and 45 comments between Sep 14, 2026 – Oct 14, 2026. People get by with Windows Event Viewer, Netwrix, and Varonis, and that still leaves this job open. Hotness is 2.90, Simmering. Real but moderate pain. Some willingness to pay. The thread drew 47 upvotes and 45 comments. Gaps in existing tools. Needs integrations or data deals. A first version is a hard build, about 5+ weeks, priced between $50 and $199 a month and charged as a B2B subscription. The pain, the source, the alternatives, the scope notes, and the questions on this page are free to read and free to build from. The agent starter prompt is the paid part. The first slice is on the page. One credit unlocks the rest, to paste into a coding agent, download as Markdown, or send as a private link.
Who has it
Sysadmins.
What people use now
3 options, and the gap between them.
Windows Event Viewer
Netwrix
Varonis
Real gaps in the existing tools.
Forensic File-Deletion Tracing Beyond Windows Logs is built for the part these leave undone.
A way through
A deep file-event forensics tool that enriches Windows logs with context (cloud sync, antivirus, scripts) to explain 'system' deletions.
MVP scope
The first version, in 6 weeks.
- 00 Goal
The one job
Explain 'PID 4 System' deletions by correlating cloud sync, antivirus and scripts with audit events.
- 01 Weeks 1–2
The core
Enrich Windows file-event logs with context: cloud sync, antivirus, scripts.
- 02 Weeks 3–4
The follow-through
Explain the deletions logged as 'system'.
- 03 Weeks 5–6
How it ships
As a desktop app that runs on the user's own computer. AI helps, but the core job works without it.
- — Not in v1
Left out on purpose
Replacing Windows Event Viewer. Version one does the one job above and stops there.
How it could charge
The business model, at a glance.
- Model
- B2B SaaS
- Price
- $50–199 a month
- Buyer
- CompaniesA business with a budget pays
- Region
- Global
Hotness
Why it scores 2.90.
Real but moderate pain. Some willingness to pay. The thread drew 47 upvotes and 45 comments. Gaps in existing tools. Needs integrations or data deals.
47 upvotes 45 comments r/sysadmin Sep 14, 2026 – Oct 14, 2026 verified Oct 14, 2026 Thread ↗
Weights: pain 25%, willingness to pay 20%, demand 20%, gap 15%, ease 10%, recency 10%. Recency is recomputed every build. The source report’s 1–10 score is not shown.
Market size · estimate
How big this could get
A bottom-up estimate for Forensic File-Deletion Tracing Beyond Windows Logs: real customer counts × a realistic price. Not a forecast.
$119M a year
99,000 orgs · 30% of US network and systems administrators
$24M a year
20,000 orgs · English-speaking, online
$240K a year
200 orgs · 1% of the reachable segment in three years
What that means
200 orgs at $100/mo = $240K ARR
Low confidenceHow we estimated this
- Base: 331,500 US network and systems administrators.
- Has the problem: 30% (assume 30% run Windows file servers with audit needs).
- Revenue per org: $1,200 per year ($99/mo).
- Reachable: 20% (English-speaking, online).
- Three-year capture: 1% of the reachable segment.
TAM = customers with the problem × revenue per customer. SAM = the part an early product can reach. SOM = a conservative three-year share of SAM. Bars use a log scale. Shares marked “assume” are our judgment, not measured.
Source: BLS Occupational Outlook, 2024
Take it to a build
Build Forensic File-Deletion Tracing Beyond Windows Logs with an agent, or with us.
Agent starter prompt
$9.99 / 1 credit
A full PRD written for a coding agent: scope, data model, screens, edge cases, and the first week of tasks for this idea.
- Copy it straight into Claude Code, Cursor, or Codex.
- Download it as a .md file you keep.
- Send your bot a private link that refreshes every seven days.
# Agent starter prompt: Forensic File-Deletion Tracing Beyond Windows Logs You are a senior product engineer. Build only the product described in this document. If a detail is missing, choose the smallest option and write it down in the README. Do not invent a second product, a marketplace of marketplaces, or a growth hack. ## Product Name: Forensic File-Deletion Tracing Beyond Windows Logs One line: Explain 'PID 4 System' deletions by correlating cloud sync, antivirus and scripts with audit events. Shape: Desktop app AI stance: AI-assisted Region for v1: Global Hotness (context only, not a requirement): 2.90 (simmering). Real but moderate pain; some willingness to pay; thread engagement 47▲/45💬 (demand 2/5); gaps in existing tools; needs integrations or data deals. ## Problem PDFs vanish from a network share and the audit log only shows the same user and laptop with 'PID 4 (System)'. Standard logs can't explain what happened. Who feels it: Sysadmins.
The first slice is above. The rest unlocks for 1 credit and is never in this page’s HTML.
Credits work on both sites. On Business Ideas to Build the same credit unlocks the business plan and growth playbook for Forensic File-Deletion Tracing Beyond Windows Logs.
Or we build it
Your first version, shipped by our team.
A working product in your repo, built from this PRD. You own the code.
$1,000 scoping fee, credited toward the build.
Equity instead of cash is an application, not a checkout →Questions
Is this idea already taken?
People already use Windows Event Viewer, Netwrix, Varonis. Those options do not do the job in the solution above. The idea is free to build. Nothing here is an exclusive claim.
How hard is a first version?
Hard. A tight MVP is about 6 weeks (5+ weeks), assuming the regulated or partner-gated parts are stubbed. The paid prompt turns that into tasks.
Who would pay, and how?
The audience is sysadmins. Charge a B2B subscription, and test a price between $50 and $199 a month. Willingness to pay is one input to Hotness, not a promise that someone will buy.
Can I use the evidence?
Yes. Build the product. The thread title is a short excerpt with a link, not a quote we are putting in someone's mouth. Exact post dates and verbatim lines are added only after a manual check. Ideas are suggestions, not medical, legal, or financial advice.
The sister site has the plan and the first month of distribution. Your credits work there too. Plan and growth prompts