windows antivirus & cleaning software
cleaners
- ccleaner http://www.ccleaner.com/
antivirus
- avira http://www.free-av.de/de/download/download_servers.php
- panda http://www.cloudantivirus.com/en/
- http://www.microsoft.com/Security_Essentials/ (via @boerge30)
- AVG free http://free.avg.com/de-de/startseite
- mc afee free scan http://home.mcafee.com/Downloads/FreeScan.aspx
anti malware
- ad aware http://www.lavasoft.de/products/ad_aware_free.php
- spybot http://www.safer-networking.org/de/download/index.html
- windows defender http://www.microsoft.com/germany/windows/products/winfamily/defender/default.mspx
firewalls
- comodo firewall http://personalfirewall.comodo.com/
- sygate firewall alt http://www.sygate.de/
- jetico http://www.jetico.com/firewall-jetico-personal-firewall/
- zone alarm http://www.zonealarm.com/security/en-us/zonealarm-pc-security-free-firewall.htm
rescue
- http://www.f-secure.com/en_EMEA/security/security-lab/tools-and-services/rescue-cd/ (via @beyondmk)
- http://www.techmixer.com/free-bootable-antivirus-rescue-cds-download-list/ (boot cds / dvds)