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Hallo,

My name is Jeannot Thewissen. I am from the Netherlands so it could be that my english isn't so good.
What's my Problem:

Windows 8.1 is acting strange. With acting strange I mean:
- automatic zoom in. (won't zoom out) or can zoom out and immidiately windows zooms in.
- keyboard doesn't work really good (wrong keys for example: I push D and windows help comes up)
- No virusses detected. Scanned with Avira and AVG
- Windows won't close programs
- clicking on buttons for closing doesn't work. I have to click more than 10 times to close.

What could it be?
- Corrupted system.
- Hidden virusses.
- etc.

I hope I get an answer soon!

Kind regards,

Jeannot Thewissen

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Quick follow-up for — when strange input and UI symptoms were traced to malware, it’s important to verify the system is actually clean and repair anything the infection damaged. The short checklist below focuses on practical verification and recovery steps that apply to Windows 8.1 systems. (support.microsoft.com)

Start with an offline / rescue scan (don’t rely on a single quick scan). Save work, then run a full offline scan from recovery so the scanner runs before Windows and persistent malware can hide. If you can’t run an offline scan from inside Windows, boot to Safe Mode or use a trusted rescue image to scan the disk. (learn.microsoft.com)

Repair Windows system files next. Open an elevated Command Prompt and run DISM followed by SFC to restore corrupted system files, then reboot and repeat a full antivirus scan:

DISM.exe /Online /Cleanup-Image /RestoreHealth
sfc /scannow

These steps fix many symptoms caused by corrupted or replaced system files. (support.microsoft.com)

Look for persistence mechanisms (autostart entries, scheduled tasks, drivers). Use Microsoft Sysinternals Autoruns to inspect and disable unknown startup items, then check Task Scheduler, Services, and the contents of C:\Windows\System32\drivers for suspicious drivers. If the infection appears kernel-level or returns after cleanup, use a bootable rescue disk or prepare to reinstall/recover Windows from recovery media. Don’t delete things unless you know what they are—disable first and research entries. (learn.microsoft.com)

Final hygiene: change all important passwords from a different, known-clean device and enable two-factor authentication; review account sign-in history and connected apps. If stability or evidence of ongoing control remains, back up personal data (avoid restoring executables or installers) and do a clean reinstall using recovery media. (learn.microsoft.com)

If further detail is wanted (how to use Autoruns safely, how to create a recovery USB, or how to interpret SFC/DISM output), include the failure messages or post screenshots of Autoruns entries and the exact SFC/DISM results for targeted next steps.

Member Avatar for jean122

Windows is activated. Forgot to say that.

Member Avatar for jean122

Solved it. I Used NOD32 (ESET) online scanner which found a virus.
The description if you googled it was: Virus: Third party control

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