Follow these steps:
1. Download kav18.104.22.1687en.exe from http://www.kaspersky.com/anti-virus_trial/.
2. Make sure 7-Zip is installed (can be downloaded from http://www.7-zip.org/).
3. Right click kav22.214.171.1247en.exe and in the 7-Zip menu choose “Extract to kav126.96.36.1997en”.
4. Install Orca MSI Editor from here, rightclick the in the previous step extracted kav.en.msi and choose Edit with Orca.
5. Open the CustomAction table, look for the row with as Action: ErrorIncompatibleOSTypeShow, rightclick it and choose Drop Row.
6. Save the msi and install! :geek: