Find and fix Windows problems — and prove they’re fixed.
Kajlos checks your PC, shows you exactly what is wrong, and — where it is safe to — fixes it. In plain language, with no scare tactics.
- Find
- Evidence
- Repair
- Verify
- Proxy is off
- example.com opens over HTTPS200 · 142 ms
- Find
- Evidence
- Repair
- Verify
- Default output is Speakers
- Not muted, volume 64%
- Find
- Evidence
- Repair
- Verify
- Queue is empty and moving
- Printer reports Ready
- Finds the causenot just “something is slow”
- Shows the evidenceevents, settings, timestamps
- Repairs carefullysmall, named, asked first
- Proves it worksre-checks, then again later
The Windows problems that actually ruin your day.
Describe it the way you’d tell a friend. Kajlos picks the right checks and tells you what it found.
Internet stopped working
Internet & Wi-Fi
Adapter, DHCP, DNS and proxy — checked in order, so you learn which one broke.
No sound
Sound
Wrong output device, a muted endpoint or a stuck audio service.
Printer won’t print
Printing
Stuck print jobs, a printer marked offline, a spooler that needs a restart.
Camera doesn’t work in calls
Camera
Disabled devices, privacy settings, and the camera service other apps depend on.
Updates keep failing
Windows Update
Reads the actual error code, then retries or repairs the update components.
My PC got slow
Speed & startup
Which program is using the CPU right now, and what slows every boot.
Disk is full
Disk space
What’s taking the space, and which files are genuinely safe to remove.
Is my PC protected?
Security basics
Real-time protection or the firewall quietly turned off.
Excel froze with my work in it
Office
Save a rescue copy first, recover unsaved files, then deal with the frozen app.
Device stopped working
Devices & drivers
Devices that were disabled or dropped, and a rescan to bring them back.
The same error keeps popping up
Recurring errors
Repeating crashes and scheduled tasks that point to software you already removed.
Something else?
Just type what’s wrong.
When your PC is struggling, Kajlos steps in before you have to restart.
Rescue Guard watches in the background for a PC that is running low on memory or a program that has stopped responding. It warns you early, shows what is behind it, and protects your work before anything is closed.
Included in the free version
My PC froze and I had to restart
Warns before the PC stalls
Kajlos keeps an eye on memory and tells you when the PC is heading for trouble and which program is behind it. You can slow that program down, pause it or end it, and nothing is closed without your OK.
Excel says ‘Not responding’ and my work isn’t saved
Rescues Office work first
Before anything is closed, Kajlos copies Office’s recovery files and saves a rescue copy of your open document to Documents\Kajlos Rescue. If Excel is only busy calculating, it suggests waiting.
Programs keep running after I closed them
Finds leftover programs
Background programs left behind by a closed terminal or tool, and how much memory they hold. They are ended only when you say so, or by a rule you approved. A program with a window open is never closed automatically.
Port already in use
Frees a port a leftover is holding
When a leftover dev server is holding the port your next run needs, Kajlos shows which program it is and offers to end it.
My disk is filling up because OneDrive keeps downloading
Shows what OneDrive is using
Kajlos shows how much disk space OneDrive’s local copies take, and can offer to make them online-only again, the same as “Free up space” in File Explorer. Nothing is deleted, opening a file downloads it again, and you are asked first.
What Rescue Guard does, exactly
Warns early
Tells you when the PC is heading for a slowdown or for running out of memory, and which program is behind it.
Asks before closing
Leftover programs are ended only when you say so, or by a rule you set up and approved in Settings. Every action is written to a log, and some can be undone.
Saves Office work first
Recovery files are copied and a rescue copy of the open document is saved before a frozen Office app is closed. Office apps are never closed automatically.
Leaves open windows alone
A program with a window open is never closed automatically. You can still end it yourself from the Rescue panel.
Stays on your PC
It runs locally. Rescue Guard itself sends nothing about your programs, documents or memory use off your PC.
What it can’t do
It can only rescue what Office has saved or recovered, so a document that was never saved and never autosaved may not be recoverable. A program stuck deep inside Windows can’t be ended by anyone, and then a restart is the honest answer. Kajlos says so instead of pretending.
Four steps. None of them is “trust us”.
Every step shows its work, so you can see what Kajlos sees — and decide for yourself.
Find the cause
Kajlos checks event logs, drivers, services and the network — and shows what actually went wrong, not just "something is slow".
Show the evidence
Every finding comes with concrete evidence: which service is stopped, which driver is out of date, which event happened and when. You see exactly what Kajlos sees.
Repair safely
Repairs are small and bounded, and each one says what it changes and how to undo it. Before a significant change, Kajlos offers to create a restore point. Nothing changes without your permission.
Check it works again
After a repair, Kajlos re-checks the exact thing that was broken — it does not just say "done".
No scare tactics. No “Fix all” button.
You’ve seen the apps that find a thousand “problems” and then ask for your card. Kajlos works the other way round.
The typical cleaner
- Counts registry entries and temp files as “problems” to look alarming.
- One big button that changes dozens of things you can’t see.
- Says “Optimised!” whether or not your actual problem went away.
- Keeps running in the background, reminding you it’s needed.
Kajlos
- Starts from your problem, and reports what it found — including “nothing is wrong here”.
- Each repair is named, explained and asked for separately.
- Tests that the thing you needed works again, and tells you if it doesn’t.
- Some problems it only explains, and leaves the decision to you.
Built so a repair can’t make things worse.
Kajlos doesn’t improvise on your PC. It can only perform repairs from a fixed, reviewed list — each one small, checked and recorded.
A fixed catalogue of repairs
Nothing outside that list can change your machine. Each repair is checked against a real device, printer or setting before it runs.
Restore point first
Before a significant change, Kajlos offers to create a Windows restore point. Every repair is written to a journal you can read.
Admin only when it’s needed
Most checks need no special rights. When a repair does, Windows asks you first — and the elevated helper exits once it’s done.
- restore point offered · skipped (low risk)info
- NETWORK_DISABLE_MANUAL_PROXYok
- previous proxy setting recordedok
- verify: https://example.com → 200pass
- After sleepStill working
- Next dayStill working
- In a weekScheduled
Kajlos checks a fixed problem again after the PC sleeps, the next day, and a week later — because some problems come back.
Prefer to fix it yourself?
Step-by-step articles for the problems people search for most. Free, no download needed.
Your PC’s details stay on your PC.
Kajlos is software that runs on your computer. Most of what it does never leaves it — and the privacy notice says exactly what does. Privacy notice
Diagnosis happens locally
Logs, settings and evidence are read and analysed on your machine.
Crash reports are redacted
No names, paths or personal data. On by default so we can fix bugs — and you can turn it off in settings.
No trackers on this site
No analytics, no advertising trackers, and no fonts or scripts from anyone else’s servers. The only cookie we set remembers your language.
Honest about the limits.
Kajlos is a beta. It does not fix everything and can sometimes be wrong. Complex or risky repairs are labelled as such, and for some problems Kajlos will only explain, leaving the decision to you. This is not a tech-support service — it's software you install and run yourself.
Good questions.
Something not covered here? The knowledge base explains common Windows problems step by step.
Browse the knowledge baseIs Kajlos a cleaner or a “PC optimizer”?
No. It doesn’t hunt for things to delete or count registry entries. It starts from a problem you actually have, finds the cause, and repairs only that — then checks the repair worked.
Will it change anything without asking me?
No. Checking is read-only. Every repair is shown to you — what it changes, how risky it is and how to undo it — and only runs when you say so. The one exception is Rescue Guard’s automatic actions, which you control in Settings: by default the only thing that happens on its own is copying Office’s recovery files to a safe folder, and nothing is deleted.
Does it need administrator rights?
Only to install, and for certain repairs (for example, clearing a stuck print queue). In that case Windows shows its usual permission prompt first.
Why does Windows SmartScreen warn me when I run it?
Kajlos is not yet code-signed, so SmartScreen may show an “Unknown publisher” warning the first time. This is expected for a beta, not a sign the file is unsafe. Click “More info” → “Run anyway”. You can compare the file’s SHA-256 with the one on the download page. We plan to sign the build before the open beta.
Which versions of Windows are supported?
Windows 10 (version 2004 or later) and Windows 11, 64-bit.
Is this a tech-support service?
No — it’s software you install and run yourself. Nobody connects to your PC remotely.
Something broken right now?
Download Kajlos, describe the problem, and see what’s actually going on.