Today I installed Kaspersky Internet Security 2013 final from http://usa.kaspersky.com/ , during installation it prompted me that WSA (v18.104.22.168) was incompatible with KIS2013. It gave me the choice of keeping WSA installed or removing it, I choose to keep it. After I started browsing in Firefox, the moment I typed something in the search field of Google I got a BSOD from Windows. After that I uninstalled WSA to see if the problem would disappear, and indeed it did. After that I installed WSA again, and I got a bluescreen again after typing something in Google. Steps to reproduce the problem on my computer after WSA was installed: - Install Kaspersky Internet Security 2013 (kis2013_22.214.171.12490EN_3458.exe). - Use the updater to get the latest malware definitions for KIS2013. - Restart computer. - Open browser (either IE9 or Firefox 14) with Google as starting page. - Install the Kaspersky browser extensions when prompted. - Begin typing in the search field of Google. - This results in a blue screen of death. The memory dump files made references to the following, which also seem to include Kaspersky and Windows keyboard drivers causing problems on the kernel level: klkbdflt.sys (klkbdflt+0x1514) 0xD1 (0x0, 0x2, 0x1, 0xFFFFF88005B28954) DRIVER_IRQL_NOT_LESS_OR_EQUAL kbdclass.sys (kbdclass.sys+4954) 0xD1 (0x0, 0x2, 0x1, 0xFFFFF88005B28954) DRIVER_IRQL_NOT_LESS_OR_EQUAL ntoskrnl.exe (nt+0x7F1C0) 0xD1 (0x0, 0x2, 0x1, 0xFFFFF88005B28954) DRIVER_IRQL_NOT_LESS_OR_EQUAL Browsers tested to confirm the problem: - Internet Explorer 9 32-bit - Firefox 14.0.1 I running Windows 7 Ultimate 64-bit with Service Pack 1 with a Logitech G15 Orange Gaming keyboard. Any ideas?