When i installed avast on my mom's new laptop (win8), it wasn't able to boot immediately after the next restart and had to be formatted. I never had this trouble before. I am sure that nothing conflicted with it.
Also i my pc (win7), avast caused a lot of driver problems (modules showed up but didn't load) and made my net unusable.
the next moment when avast was removed, my pc came back to normal. Please guide.
Thanking you
Akash Ravi