Windows Explorer Illegal Operation

PC amateur needs help - yesterday I right-cliked on the start button and instead of the normal Windows Explorer options, I got an 'illegal operation' message, with details copied below. I re-loaded (I think) explorer from my master disk but that didn't clear the problem. I have teenage sons who use the PC so anything could have caused this! Advice gratefully received!

EXPLORER caused an invalid page fault in
module CNVSHELL.DLL at 0177:10004d60.
Registers:
EAX=00000000 CS=0177 EIP=10004d60 EFLGS=00010246
EBX=00000000 SS=017f ESP=0086f09c EBP=00000040
ECX=00000000 DS=017f ESI=005b4240 FS=34b7
EDX=00000000 ES=017f EDI=0086f2d0 GS=0000
Bytes at CS:EIP:
8a 08 83 c4 14 3a cb 5f 5d 74 02 88 18 6a 08 e8
Stack dump:
0086f0c8 0000005c 0086f0c8 1002abe8 00000208 8007000e 0086f328 005b4240 00000000 00000000 005b4240 00000000 00000000 00000000 00000000 00000000

 

Hi whited
Welcome to the boards. Can you double check that error and see if it's supposed to be NAVSHELL.DLL rather than CNVSHELL.DLL?

Daizy

 

Hi again whited. Thank you for the note..but if we leave it on the board, others may be able to jump in and help as well.

I'll admit...I'm thoroughly stumped. I've never heard of CNVSHELL.DLL .

So....... Let's start with the small stuff.
Recent and updated virus scan? If not... use Housecall.

Checked your computer for spyware?

All your critical windows updates done?

Long and tedious I know...but we've got to start somewhere?

Daizy