I am your company’s anti-virus software users, although they are using the free version. 
Recently, my old laptop has some minor trouble, is updated to 17.4.2294 version, the operating system began to frequent blue screen, but remove the anti-virus software, it no longer appears blue screen, try to re-install anti-virus software, The result is the same, I hope someone can help find the problem, the following is my laptop hardware and software specifications
Model: ASUS F3SV
CPU: Intel Core 2 Duo T7300
RAM: 4GB DDRII
Chip: Mobile Intel 965 PM
Display: NVidia Geforce 8600M
SSD: SanDisk 240GB
HDD: Hitachi 160GB
OS: Windows7 Ultimate 64bit
I have a lot of computers, but only the computer installed your company free anti-virus software have this problem.
Note: I am Taiwanese, English is not very powerful, the above are translated with Google, so the grammar on the word some strange place, please forgive me.