Driver irql not less or equal

My computer keeps getting blue screen stop messages randomly when I'm on the internet. At the top it says driver irql not less or equal. Then it says afd.sys... and Stop: 0x000000D1 (0x00000020, 0x00000002, 0x00000000, 0xF67EB73A)
I have included some minidump files.
I'm not all that computer savvy, but would really appreciate some help.

You may have two problems.

Suggestions:
1. Uninstall Norton AV (it's old). You should only have one AV program anyway. Stick with Kaspersky.
2. Update netrcacm.sys, which is a RCA USB Digital Cable Modem Driver. It's also old.

Image name: netrcacm.sys Timestamp: Tue Jan 21 02:50:35 2003 (3E2C36EB)

FYI only

Inside the DMP files:

Unable to load image SYMTDI.SYS, Win32 error 0n2
*** WARNING: Unable to verify timestamp for SYMTDI.SYS
*** ERROR: Module load completed but symbols could not be loaded for SYMTDI.SYS

Unable to load image netrcacm.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for netrcacm.sys
*** ERROR: Module load completed but symbols could not be loaded for netrcacm.sys

Unable to load image SYMTDI.SYS, Win32 error 0n2
*** WARNING: Unable to verify timestamp for SYMTDI.SYS
*** ERROR: Module load completed but symbols could not be loaded for SYMTDI.SYS
Probably caused by : SYMTDI.SYS ( SYMTDI+1940a )