Inspiron 560 burning out webcams

Hi I have a 560 Inspiron

pentium dual core E5400@ 270GHz

8.0 GB of ram

64 Os x64 based processor

Windows 10

I seemed to have burned out 2 logitech webcams 

1 B-525  and 2 c-270s The first 270 lasted a long time cuz it was outside of the 2 yr warranty

I bought another to replace, it lasted maybe a month. I kept messing around figuring it was
was me or  the software or something. . .

So anyway I bought the B252 HD it worked great the picture was real clear and the audio

2 weeks later it died the microphone still got picked up a while. After a couple weeks with logitech's support they are sending me a new one. When I was trying to fix it by myself I was trying the latest drivers and stuff. The didn't even give me a link to one this time. He said win10 has all the necessary  software.

My problem is if this PC is burning them out for some reason within the last few months I don't want to burn out the new one.

Is there anywhere you can suggest  to look for something bad in this computer

that could be killing the video part of the camera? I tried all the old ones on different PCs and stuff they do not work there

I did run the system diagnosis with support assist  10 min check first, then the complete one and it did not find anything wrong

thanks mark