Improve Security in Windows – Security Check in Helsinki

Windows security problems are not always caused by a traditional virus. In many cases we see at Bitmaster, the issue is a compromised email account, a phishing link, unwanted browser extensions, outdated Windows updates or missing backups.

At Bitmaster in Punavuori, Helsinki, we check Windows 10 and Windows 11 computers when something feels suspicious or unsafe. We look at the actual situation first and then recommend a sensible next step: cleanup, account security, backup, data recovery or a clean Windows reinstall.

Signs your Windows computer may not be secure

A security issue does not always look dramatic. Sometimes the computer still works, but the browser behaves strangely, accounts show login warnings or Windows protection is turned off.

• The browser opens unknown pages or shows unusual ads
• Your email, Microsoft or Google account shows suspicious login activity
• Microsoft Defender or another antivirus has been disabled
• The computer has suddenly become slow without a clear reason
• Files have disappeared, changed names or become locked
• You clicked a suspicious link or opened an unknown attachment
• You are unsure whether online banking is safe on the computer

If you suspect malware or account theft, avoid online banking and important logins on that computer until it has been checked.

Common Windows security problems we see

Many customers expect a classic virus, but the real issue is often somewhere else. We regularly see browser hijackers, fake cleanup programs, phishing-related account problems and Windows installations that have not been updated properly for a long time.

• Browser hijackers: the search engine changes, ads appear or the browser redirects to unwanted websites.
• Unwanted cleanup tools: programs that scare the user with warnings and ask for payment.
• Compromised accounts: email, Microsoft or Google accounts affected by reused passwords or phishing.
• Outdated Windows updates: known security holes remain open because updates have failed or been ignored.
• No working backup: the risk becomes serious only when important files are already in danger.

What you can safely check yourself

1. Check Windows Update

Open Settings → Windows Update and check whether updates are waiting. Security updates fix known vulnerabilities and should not be postponed for long.

2. Check Windows Security

Open Windows Security and look for warnings. Microsoft Defender is enough for most home users when it is enabled and up to date.

3. Change important passwords from another device

If you suspect account theft, change your email, Microsoft and Google passwords from another device that you trust.

4. Enable two-factor authentication

Two-factor authentication helps protect your accounts even if a password has been leaked or guessed.

5. Check your backups

A backup is useful only if the files can actually be restored. Check that your most important files exist in another location.

When to bring the computer to service

Professional help is sensible when the computer contains important files, online banking is used on the same machine, or you are unsure whether accounts have been compromised. The first step is to find out whether the problem is malware, an account issue, a browser problem or a damaged Windows installation.

• The computer has malware or suspicious software
• Windows does not start normally
• You suspect that an email or Microsoft account has been compromised
• Important files exist only on this computer
• You need a clean Windows reinstall
• You want to avoid installing unnecessary security software

Cleanup, security check or Windows reinstall?

More security software is not always the answer. Often the right fix is to remove unwanted programs, check browsers, secure accounts and make sure Windows protection works properly.

If the system is badly damaged, a clean Windows reinstall may be the safer and faster option. If there are important files and no backup, securing the data should come before aggressive cleanup.

Typical prices

• Windows security check: usually €49–89
• Malware removal: usually €69–149
• Clean Windows reinstall: usually €89–149
• Backup or file transfer help: usually €49–129
• Data recovery in problem cases: usually €100–400 depending on the damage

The exact price is confirmed after checking the situation. We agree an estimate when the device is received. If the work can be completed within that estimate, we carry it out. If the estimate would be exceeded or substantially more work is needed, we contact you before continuing.

Frequently asked questions

Is Microsoft Defender enough?

For most Windows 10 and Windows 11 users, Microsoft Defender is enough when Windows is updated and account security is handled properly. A separate antivirus does not replace strong passwords, backups and careful browsing.

What should I do if I clicked a suspicious link?

Avoid online banking and important logins on that computer. Change important passwords from another trusted device and enable two-factor authentication where possible.

Should Windows be reinstalled after malware?

It depends on the situation. Light browser-related problems can often be cleaned without reinstalling Windows. If the system is badly infected or full of unknown software, a clean reinstall is often more reliable.

Can you check if my computer has a virus?

Yes. We check Windows Security, startup programs, browsers, suspicious software and the general condition of the system.

Can you help if my email or Microsoft account was hacked?

We can check the computer and help with practical account security steps. Actual account recovery depends on the recovery options provided by Microsoft, Google or the email provider.

How long does a Windows security check take?

A basic check is often completed the same or next business day. Malware removal, backups or data recovery may take longer depending on the situation.

Contact Bitmaster

If you are not sure whether the issue is malware, account theft or a Windows problem, describe what happened. We will tell you whether the computer should be checked and what the sensible next step is.